Hkkjrh; ekud IS 2418 (Part 2) : 2018

Indian Standard

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Tubular Fluorescent Lamps for

General Lighting Service
Part 2 Performance Requirements

( Second Revision )

ICS 29.140.30

© BIS 2018

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BUREAU OFINDIANSTANDARDS
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MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI-110002
www.bis.org.in www.standardsbis.in

September 2018 Price Group 15

Lamps and Related Equipments Sectional Committee, ETD 23

FOREWORD
This Indian Standard (Part 2) (Second Revision) was adopted by the Bureau of Indian Standards, after the draft
finalized by the Lamps and Related Equipments Sectional Committee had been approved by the Electrotechnical
Division Council.
This standard was first published in 1964. The first revision was published in 1977. This revision has been undertaken
with a view to upgrade many of the essential characteristics of double-capped fluorescent lamps and primarily to
align the existing standard with latest International Standard.
This standard specifies the requirements and method of tests to be followed in determining the performance and
life, including method of sampling and conditions of compliance.
This standard is based on IEC 60081 (2002) ‘Double-capped fluorescent lamps—Performance specifications’
issued by the International Electrotechnical Commission except for the following modification:
a) Only selected lamp types which are in use have been covered, and
b) Ambient test conditions are based on national conditions.
For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,
observed or calculated, expressing the result of a test or analysis shall be rounded off in accordance with IS 2 : 1960
‘Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off
value should be the same as that of the specified value in this standard.
 IS 2418 (Part 2) : 2018

Indian Standard
TUBULAR FLUORESCENT LAMPS FOR GENERAL
LIGHTING SERVICE
PART 2 PERFORMANCE REQUIREMENTS

( Second Revision )
1 SCOPE IS No. Title
2418 Tubular fluorescent lamps for
1.1 This standard (Part 2) specifies the performance
general lighting service:
requirements and test including standard lamp data (Part 1) : 2017 Safety requirements (second
sheets for double-capped fluorescent lamps, commonly revision)
known as tubular fluorescent lamps for general lighting (Part 3) : 1977 Dimensions of G-5 and G-13 bi-
service. Lamps of the following types are covered in pin caps (first revision)
this standard: (Part 4) : 1977 Go and no-go gauges for G-5 and
a) Lamps with preheated cathodes for operation G-13 bi-pin caps (first revision)
on a.c. mains with or without the use of starter; 2500 (Part 1) : Sampling procedures for
2000 inspection by attributes : Part 1
b) Lamps with preheated cathodes for operation
Sampling schemes indexed by
on high frequency with or without the use of
acceptance quality limit (AQL) for
starter; and lot-by-lot inspection (third
c) Lamps with non-preheated cathodes for revision)
operation on high frequency supplies without 5081 : 1990 Glass tubes for tubular fluorescent
the use of starter. lamps for general lighting service
1.2 It may be expected that lamps which comply with — Specification (first revision)
this standard, when operated with a starter complying 13021 a.c. supplied electronic ballasts for
with IS 2215 and with ballasts complying with IS 1534 tubular fluorescent lamps:
(Parts 1) or IS 13021 (Parts 1 and 2) shall start and (Part 1) : 1991 General and safety requirements
operate at voltages between 92 percent and 106 percent (Part 2) : 1991 Performance requirements
of rated supply voltage and for any ambient 10322 (Part 1) : Luminaire: Part 1 General
2014 requirements and tests
temperatures between 10° C and 50°C.
15967 (Part 2) : Capacitors for use in tubular
1.3 A lamp, on which compliance with this standard is 2013 fluorescent and other discharge
claimed, shall comply with the safety requirements of lamp circuits : Part 2 Performance
IS 2418 (Part 1). requirements
1.4 For some of the requirements given in this standard, 15974 : 2013 Auxiliaries for lamps — Starting
reference is made to “the relevant lamp data sheet”. devices (other than glow starters)
For some lamps, these data sheets are contained in this — Performance requirements
standard. For other lamps, falling under the scope of 3 TERMINOLOGY
this standard, the relevant data are supplied by the lamp 3.0 For the purpose of this standard, the following
manufacturer or responsible vendor. definitions shall apply.
2 REFERENCES 3.1 Fluorescent Lamps — Discharge lamps of the low
pressure mercury type, in which most of the light is
2.1 The following standards are necessary adjuncts to
emitted by one or several layers of phosphors excited
this standard.
by the ultraviolet radiations for the discharge.
IS No. Title 3.2 Double-Capped Fluorescent Lamps —
1534 (Part 1) : Ballasts for fluorescent lamps: Fluorescent lamps having two separate caps and having
1977 Part 1 For switch start circuits tubular form of either linear or curved shape.
(second revision)
2215 : 2006 Starters for fluorescent lamps 3.3 Lumen Maintenance — Ratio of luminous flux
(third revision) of a lamp at a given time in its life to its initial luminous
flux, the lamp being operated under specific conditions.
2407 : 1963 Specification for photometric
The ratio is generally expressed as a percentage.
integrators
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IS 2418 (Part 2) : 2018

3.4 Reference Ballast — Special ballast, either 3.13.4 Type Test Quantity (TTQ) — The number of
inductive for lamps for operation on a.c. mains lamps selected for the purpose of determining the
frequencies, or resistive for lamps for operation on high acceptability of a lamp type.
frequency. It is designed for the purpose of providing
3.14 Life — The life of a lamp is the number of hours
comparison standards for use in testing ballasts, for the
it operates to ‘burn out’ or to any other criterion of life
selection of reference lamps and for testing regular
performance laid down in this standard.
production lamps under standardized conditions. It is
essentially characterized by the fact that, at its rated 3.15 Routine Test — Test carried out on each lamp
frequency, it has a stable voltage/current ratio which is to check requirements which are likely to vary during
relatively uninfluenced by variations in current, production.
temperature and magnetic surroundings, as outlined in
3.16 Type Tests — Tests carried out to prove
IS 1534 (Part 1), IS 13021 (Part 1 and 2).
conformity with the standard. These are intended to
3.5 Calibration Current of a Reference Ballast — prove the general qualities and design of a given type
Value of the current on which the calibration and control of lamp.
of the reference ballast are based.
3.17 Type Test Sample — Sample consisting of one
3.6 Nominal Value — Approximate quantity value or more similar units submitted by the manufacturer or
used to designate or identify a lamp. responsible vendor for the purpose of a type test.
3.7 Rated Value — Quantity value for a characteristic 3.18 Acceptance Tests — Tests carried out on samples
of a lamp for specified operating conditions. The value taken from a lot for the acceptance of the lot.
and the conditions are specified in this standard, or
assigned by the manufacturer or responsible vendor. 4 SELECTION OF LAMPS FOR TEST
(SAMPLING)
3.8 Group — Lamps of the same rated electrical
characteristics and physical dimensions. 4.1 Method of Selection
3.9 Type — Lamps of the same group having the same The inspection, rating life (test) and life test quantities
photometric ratings and colour characteristics. shall be as specified in 4.2 to 4.3. The selection of lamps
for individual batches shall be as given in 4.1.1.
3.10 Batch — All the lamps of one type put forward
at one time for acceptance tests. 4.1.1 The selection of lamps for individual batches
should be made as follows:
3.11 Initial Readings — The initial reading are the
measurements of the luminous and electrical a) Up to and including 20 containers per batch
characteristics, excluding the checking of starting — Out of every container an equal number of
voltages, made at the end of the 100 hours ageing lamps (or as near to equal as possible) shall be
period. selected at random in order to obtain the 20
lamps required; and
3.12 Starting Aid — Conductive strip affixed to the
outer surface of a lamp, or a conductive plate which is b) Over 20 containers per batch — Out of 20
spaced within an appropriate distance from the lamp. A containers, evenly distributed over the whole
starting aid is usually connected to earth potential, and batch, one lamp shall be selected at random
can only be effective when it has an adequate potential from each container to obtain the 20 lamps
difference from one end of the lamp. required.
4.2 Inspection Test Quantity (ITQ)
3.13 Test Quantities
Inspection test quantity shall consist of 20 lamps.
3.13.1 Inspection Test Quantity (ITQ) — The
number of lamps selected for the purpose of 4.3 Rating Test Quantity (RTQ)
determining the acceptability of a batch as to
Rating test quantity consisting of 15 lamps shall be
marking, mechanical and physical requirements, and
selected at random from the lamps which have passed
starting characteristics.
the inspection test. The RTQ for determining the
3.13.2 Rating Test Quantity (RTQ) — The number of acceptability as to colour appearance may, however,
lamps selected for the purpose of determining the be restricted to three (see 8.3.2).
acceptability of a batch as to initial readings and colour.
4.4 Life Test Quantity (LTQ)
3.13.3 Life Test Quantity (LTQ) — The number of
lamps selected for the purpose of determining the Life test quantity consisting of 10 lamps shall be selected
acceptability of a batch as to life performance. at random from the lamps which have passed rating test.

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 IS 2418 (Part 2) : 2018

4.5 Accidentally Broken and/or Incorrectly 6 MARKING

Operated Lamps
6.1 The lamps shall be clearly and indelibly marked
Lamps which are accidentally broken and/or have been with the following information:
operated in conjunction with incorrect control gear
a) Name or trade-mark of the manufacturer or
before the life test is completed shall, when necessary,
supplier;
be replaced to ensure that the required number of ten
lamps completes the test. b) Rated watts (marked ‘W’);
c) Colour temperature;
Any such broken or incorrectly operated lamps shall
d) Starting conditions (for lamps to be used as
be neglected in the calculation of life test results.
starter less);
NOTE — In order to avoid unnecessary delay it is recommended e) Country of manufacture;
that spare lamps be available through the tests.
f) The rated lumen output;
5 MECHANCIAL, PHYSICAL AND STARTING g) High lumen for 18W HL and 36W HL; and
REQUIREMENTS h) Rated life.
5.1 Mechanical and Physical Requirements Compliance is checked by rubbing the marking with a
piece of cloth soaked with water for 15 s.
5.1.1 Glass Tubing
After this test, the marking shall still be legible.
The glass tubes of the lamps shall be free from defects
NOTES
detrimental to service (see also IS 5081).
1 The manufacturer may declare a higher value of the rated
5.1.2 Caps lumen output than the minimum specified in the standard. Due
tolimitation of space on lamps this information may, however,
The dimensions of lamp caps shall be in accordance be marked on the carton only.
with IS 2418 (Part 3). 2 Due to limitation of space on lamps this information may,
however, be marked on the carton only.
5.1.2.1 The maximum angular displacement of the 6.1.1 The lamps may also be marked with the Standard
plane of the cap pins at one end of the lamps with respect Mark.
to the similar plane at the other end of the lamp shall
not exceed 6°. 6.1.2 The use of the Standard Mark is governed by
the provisions of the Bureau of Indian Standards
5.1.2.2 The shells of caps may be of any suitable Act, 2016 and the rules and regulations made
material, provided the caps are ordinarily resistant to thereunder. The details of conditions under which the
atmosphere corrosion and withstand the test specified. licence for use of the Standard Mark may be granted to
5.1.2.3 Contacts shall be evenly soldered, crimped or manufacturers or producers may be obtained from the
welded to ensure satisfactory engagement and electrical Bureau of Indian Standards.
contact in the appropriate holder.
7 TESTS
5.1.2.4 For lamps with G5 or G13 caps, both pins
(excluding flanges) of the two caps of a finished lamp 7.1 Classification of Tests
shall pass simultaneously, freely without binding, 7.1.1 Type Tests
through parallel slots, suitably spaced longitudinally to
receive the lamp. The slots shall each be 2.87 mm wide The following shall constitute the type tests to be carried
for G5 caps, and 3.05 mm wide for G13 caps. out on selected sample of double-capped fluorescent
lamps, samples being drawn preferably from regular
5.1.3 Dimensions production lot:
The lamp dimensions shall comply with values specified a) Visual examination and checking for marking
on the relevant lamp data sheets. (see 7.3);
5.2 Starting Requirements b) Burning test (see 7.4);
c) Starting characteristics test (see 7.5);
A lamp shall start fully within the time specified on the
d) Test for electrical, luminous and colour
relevant lamp data sheet and remain alight.
characteristics (see 7.6); and
Conditions and method of test are given in Annex A. e) Life test (see 7.8).
The starting characteristics of the lamps shall be tested 7.1.1.1 The number of samples shall be as given in
before ageing as specified in 7.5. 4.2 to 4.4 in respect of ITQ, RTQ and LTQ and the
criterion of acceptance as given in 8.

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IS 2418 (Part 2) : 2018

7.1.2 Acceptance Tests established, the contact arrangement can be chosen

arbitrarily but if the lamp is temporarily removed it
The following shall constitute as acceptance tests:
shall be replaced without changing the contact
a) Visual examination and checking for marking arrangements.
(see 7.3); 7.2.2 Ageing
b) Burning test (see 7.4);
Before the lamps are subjected to the rating tests for
c) Starting characteristics (see 7.5); and the first time, they shall be aged for 100 h of normal
d) Test for electrical, luminous and colour operation, preferably in a circuit for which they are
characteristics (see 7.6). designed.
7.1.2.1 Sampling shall be as given in 4.2 and 4.3 in 7.2.3 Lamp Wattage
respect of the ITQ and RTQ, and the criterion of The initial readings for the power consumed by the
acceptance as given in 8. lamps shall not exceed from the objective wattage
7.1.3 Routine Test indicated in the relevant lamp data sheet by more than
5 percent + 0.5 W when tested under the conditions
The following shall constitute the routine tests: specified in Annex B.
a) Visual examination and checking for marking 7.2.3.1 Objective wattage
(see 7.3); and
Objective wattage is the wattage consumed by the lamp
b) Burning test (see 7.4). when tested with reference ballast as specified in
7.2 Conditions of Tests Annex B.
7.2.1 Operating Position and Lamp Connections 7.2.4 Lamp Voltage
In the test conditions specified in 7.2.3 the initial
a) For the rating and life tests, lamps shall burn
readings of the voltage at the lamp terminals shall
in the horizontal position.
comply with the conditions specified in the relevant
b) Lamps operated with a starter lamp data sheet.
For the duration of the tests, including the life NOTE — Cathode watts due to supplementary heating are not
test, the connections of the lamp contacts, included in the objective lamp wattage unless otherwise stated
with reference to the terminations of the on the lamp data sheet.
ballast, shall not be changed. 7.2.5 Luminous Flux and Colour Characteristics
By convention, the arrangement given in Fig.1 7.2.5.1 The initial luminous flux of individual lamps
is used; the symbol ‘B’ on the diagram shall be not less than 92 percent of the rated value which
indicates the contacts to be connected to the shall be not less than the value specified in the relevant
main circuit. lamp data sheet. Initial readings shall be measured as
specified in Annex B.
c) Lamps with preheated cathodes operated
without a starter 7.2.5.2 Colour appearance
a) Nominal colours — The nominal values of
The conditions of (b) shall be followed for
the chromaticity co-ordinates shall be as
measurements of initial readings with
specified as in Annex C.
reference ballast, and for life tests.
b) Tolerance for chromaticity co-ordinates —
In cases where reference ballast has not been The chromaticity co-ordinates of the lamp

FIG. 1 POSITION OF L AMP CONNECTIONS

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 IS 2418 (Part 2) : 2018

under test shall fall within the area on the comply with the requirements of Annex E.
chromaticity chart bounded by straight lines
7.8.2 The rated life of the lamps shall be at least
joining the 12 points indicated for the nominal
5 000 h. However the rated life of the lamps covered
colours as specified in Annex C.
in the following data sheets shall be at least 10 000 h.
For other nominal chromaticity co-ordinate values
which deviate slightly from those indicated in Annex C, a) 2418-IS-6520
the co-ordinates of the relevant area are shifted b) 2418-IS-6530
accordingly. c) 2418-IS-6620
7.2.6 Cathode Characteristics of Lamps Operated d) 2418-IS-6640
Without Starter e) 2418-IS-6650
The initial readings of the cathode characteristics shall f) 2418-IS-6730
be in accordance with the values in the relevant lamps g) 2418-IS-6750
data sheet when tested under the conditions specified h) 2418-IS-6840
in Annex B. j) 2418-IS-6850
7.3 Visual Examination and Checking for Marking 7.8.3 After 2 000 h operation, including the ageing
period of 100 h, the lumen maintenance shall be not
Each lamp of ITQ shall be examined visually as well as
less than the value indicated in the relevant lamp data
checked for marking requirements detailed in 6.
sheet. It shall be measured as specified in Annex D.
7.4 Burning Test NOTES
The lamp shall be checked for its burning by supplying 1 Lamps Operated with Starter — A lamp is considered as failing
to restart, if it does not start within one minute and subsequently
it with the rated voltage. The lamp shall burn and give does not start in conjunction with another starter. Individual
uniform light. attention shall be given to each lamp on test at least once each
day.
7.5 Starting Characteristics 2 Lamps Operated without Starter — A lamp is considered as
failing to restart if it does not start within a period not exceeding
A lamp shall start fully within the time specified on the 10 s. Individual attention shall be given to each lamp on test at
relevant lamp data sheet and remain alight. Condition least once each day.
and methods of test as specified in Annex A.
8 CONDITIONS OF COMPLIANCE
7.6 Test for Electrical Luminous and Colour
8.1 General Conditions
Characteristics
A batch shall be considered as conforming to this
The methods of test for measuring electrical, luminous
standard if the requirements contained in 8.2, 8.3 and
and colour characteristics of lamps shall be as given in
8.4 are fulfilled. If the batch fails to satisfy the
Annex B.
requirements of any of these clauses, it shall be deemed
7.7 Chromaticity Co-ordinates not to comply with the standard.
The chromaticity co-ordinates shall be as given in 8.2 Mechanical, Physical, Starting and Marking
Annex C. Requirements
7.8 Life and Lumen Maintenance A batch shall be considered to comply with the
requirements of 5 and 6, if the number of lamps failing
7.8.1 Lamps shall be operated in the circuit for which
does not exceed qualifying limits given below:
they are preferably designed. For example:
Qualifying limit
a) A circuit including a starter;
a) For any single requirement 2
b) A circuit without a starter (starter less) and
b) For all requirements taken together 4
with preheating of the cathode;
1) with low resistance cathodes, and 8.3 Initial Readings and Colour
2) with high resistance cathodes. 8.3.1 Initial Readings
c) A high frequency circuit without a starter A batch shall be considered to comply with the
(starter less) requirements of initial readings, if the number of lamps
1) without preheating of the cathode, and failing does not exceed the qualifying limits given
2) with preheating of the cathode. below:
The characteristic of the ballast and the starter shall

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IS 2418 (Part 2) : 2018

Qualifying limit “2418”, followed by the letters “IS”. The second

number represents the data sheet number.
a) For initial luminous flux of 4
individual lamps 8.6.2 Diagrammatic Data Sheets for Location of Lamp
b) For wattage of individual 4 Dimensions
lamp and voltage at lamp The drawing shown below is intended only to indicate
terminals dimensions to be controlled and is to be used in
c) For all the requirements 5 conjunction with the relevant lamp standard sheets
taken together For lamps with G5 and G13 caps
NOTE — Conditions of compliance for cathode characteristics The values for dimensions A, B and C are derived from
are under consideration.
a basic value, designated X.
8.3.2 Colour A = cap face to cap face
Compliance shall be considered to be achieved if all the Amax = X
three lamps of the RTQ (see 4.3) meet the colour B = cap face to end of opposite pins
appearance requirement of Annex C. Bmax = X + 7.1 mm
In the event of one or more failures the remaining lamps Bmin = X + 4.7 mm (in some countries, Bmin = X +
of RTQ shall be tested, from which not more than four 4.6 mm)
shall fail. C = overall length of the lamp between pin ends
8.4 Lumen Maintenance Cmax = X + (2 × 7.1) = X + 14.2 mm
Cmin = not specified
A batch shall be considered to comply with the
requirements of life if the total number of lamps having The dimensions given on the lamp data sheets comply
lives shorter than 2 000 h, together with those failing to with the above system.
meet the requirements given in 7.8.3 does not exceed two. NOTES
NOTE — In the event of the life test being extended to 70 percent 1 When converting the thus calculated values to inches it is
of the rated life, compliance shall be considered to be achieved obvious that the consistency between the rounded off converted
if the number of lamps of LTQ having lives less than 70 percent values is lost.
of the rated life, together with those failing to meet the 2 In some instances, the dimensions in national specifications
requirements of 7.8.3 does not exceed four. differ slightly from those in tile data sheets. Because these
specifications are well established, it is not intended that they
8.5 Information for Luminaire Design should be changed. The dimensions in the data sheets are quoted
as desirable objective.
Refer to Annex F for information for luminaire design. 8.6.3 Lamp Data Sheets
8.6 Lamp Data Sheet The lamp data sheets are given in Annex G.
8.6.1 General Principles of Numbering of Data Sheets
The first number represents the number of this standard

G5 cap [IS 2418 (Part 3) : 1977, Table 1]

G13 cap [IS 2418 (Part 3) : 1977, Table 2]

FIG. 1A
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 IS 2418 (Part 2) : 2018

ANNEX A
(Clauses 5.2, 7.5 and 7.7.1)
TEST FOR STARTING CHARACTERISTICS

A-1 GENERAL A-2.3 Starter

A-1.1 Tests for starting requirements shall be made in The type of the starter used shall be in accordance with
still air at an ambient temperature between 20º C and IS 2215 and appropriate to the wattage of the lamp
30º C in a maximum relative humidity of 65 percent. under test.
A-1.2 Metallic parts and wires, except starting aids A-2.4 Test Voltage
when required, in the vicinity of the lamp shall be
avoided as far as possible. The voltage applied to the circuit shall be as given in
the relevant lamp data sheet.
A-1.3 The lamps shall be kept inoperative in an ambient
temperature, between 20° C and 30° C and a relative A-3 LAMPS WITH PREHEATED CATHODES
humidity not greater than 65 percent for period of at OPERATED WITHOUT STARTER
least 24 h immediately prior to the starting test.
A-3.1 Test Circuit
A-2 LAMPS OPERATED WITH STARTER
The lamps shall be tested in the circuit shown in Fig. 3.
A-2.1 Test Circuit The supply voltage shall be steady and free from sudden
changes. The frequency of supply shall be 50 Hz with
Lamps shall be tested with a 50 Hz supply with tolerance tolerance of ± 0.5 percent.
of ± 0.5 percent in the circuit shown in Fig. 2.
The voltage supplied to the cathode-heating circuits
A-2.2 Ballast shall not be so connected as to increase the voltage of
the main circuit. The two circuits shall be connected in
The ballast shall comply with the requirement of
the same phase.
E-1.1.1 and E-1.1.2 of Annex E unless otherwise stated
on the relevant lamp data sheet. It shall be rated at the The two cathode-heating transformers may be replaced
voltage as given on the relevant lamp data sheet. by one with two isolated secondary windings. The rating
of the transformer(s) shall be such that the voltage does
The preheating current, when measured at 90 percent
not change by more than 2 percent when the maximum
of the rated primary voltage, shall be between 1.1 and
cathode lead is connected.
1.2 times the nominal running current. To obtain a value
of preheat current within this range, it may be necessary The metal plate shall be 40 mm wide, positioned 20 mm
either to make a special selection from among from the lamp and have a length not less than that of
commercial ballasts or else to design and manufacture the lamp under test and shall be, together with one lamp
ballasts for this specific purpose. In some cases it may cap bonded to earth.
be possible to bring preheat current down to this range
For lamps not requiring a separate starting aid, this strip
by adding resistance in series with the starter.
shall be removed.

FIG. 2 CIRCUIT DIAGRAM FOR STARTING TEST FOR LAMPS FOR O PERATING WITH S TARTER

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IS 2418 (Part 2) : 2018

F IG. 3 CIRCUIT DIAGRAM FOR STARTING TEST FOR L AMPS WITH PREHEAT CATHODES
FOR O PERATION ON S TARTERLESS C IRCUITS

NOTE — The manufacturer shall specify whether or not the lamp does not start, it shall be rejected. If the lamp
lamps require an external starting aid and whether the cap shall
does start, it shall be operated for half an hour at rated
be connected to the earth side of the circuit.
voltage and the normal test shall be made again after a
A-3.2 Ballast rest period of 24 h.
The ballast shall be an inductive type and shall comply NOTE — The voltages specified for the starting test are chosen
primarily to secure reproducibility of test results and are not
with the requirements of E-1.1.1 and E-1.1.2 of necessarily applicable to the design of ballasts.
Annex E. It shall be rated as specified on the relevant
lamp data sheet. A-4 LAMPS FOR OPERATION ON HIGH
NOTE — The earthing of the circuit as shown in Fig. 3 may be
FREQUENCY
made if necessary to supply it through an isolating transformer.
A-4.1 Test Circuit
A-3.3 Test Voltage Lamps shall be tested with an a.c. supply with a
A-3.3.1 Voltage at the Cathode Terminals frequency between 20 kHz and 26 kHz, unless
otherwise specified on the relevant lamp data sheet,
The voltage of the heating circuit to be applied to the and in the circuits shown in:
cathode terminals shall be:
a) Figure 4 for lamps with preheated cathodes;
3.0 V for low resistance cathodes, and and
8.0 V for high resistance cathodes. b) Figure 5 for lamps with non-preheated cathodes
NOTE — These values of the cathode heating voltages have been
NOTE — The frequency range specified for this lamp test is
chosen in order to ensure reproducibility of the starting test.
not necessarily applicable to the design of ballast (see also
A-3.3.2 Voltage at Lamp Terminals ANNEX E).

The open-circuit voltage at the lamp terminals for the A-4.2 Ballast
starting test shall be as given on the relevant lamp data
The non-inductive ballast resistor shall be so adjusted
sheet.
that the high frequency lamp current is equal to the
A-3.4 The voltage of the main circuit and of the heating value as specified on the relevant lamp data sheet.
circuits shall be applied simultaneously.
A-4.3 Starting Aid
A-3.5 If the lamp does not start at the specified voltage,
this voltage shall be gradually increased up to a For lamps with preheated cathodes, the starting aid, a
maximum of 110 percent of the test value and if the metal plate, shall be connected to earth potential
together with one lamp cathode. Its length shall be
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 IS 2418 (Part 2) : 2018

F IG. 4 C IRCUIT DIAGRAM FOR STARTING TEST FOR L AMPS WITH PREHEATED CATHODES
FOR O PERATION ON H IGH F REQUENCY

F IG. 5 C IRCUIT DIAGRAM FOR STARTING TEST FOR LAMPS WITH NON -PREHEATED CATHODES
FOR O PERATION ON H IGH F REQUENCY

not less than that of the lamp under test, and it shall A-4.4 Test Voltage and Current
be 25 mm wide for 16 mm diameter lamps, and 40
For lamps with preheated cathodes, the cathode heating
mm wide for 26 mm to 38 mm diameter lamps. The
supplies shall be adjusted to supply a preheat current
distance between the surface of the lamp and the
as specified on the relevant lamp data sheet. During
starting aid shall be as specified on the relevant lamp
the preheat time, specified on the relevant lamp data
data sheet.
sheet, switch S1 shall be kept open and switches S2
The manufacturer or responsible vendor shall specify closed. After this period of time, switches S2 shall be
whether or not the lamps require an external starting opened simultaneously as switch S1 is closed.
aid, and whether one cathode shall be connected to earth
The open circuit voltage applied to the circuit shall be
potential. For lamps not requiring a separate starting
as specified on the relevant lamp data sheet.
aid, the metal plate shall be removed.

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IS 2418 (Part 2) : 2018

ANNEX B
(Clauses 7.2.3, 7.2.3.1, 7.2.5.1, 7.2.6, 7.6 and 7.7)
METHOD OF MEASURING ELECTRICAL LUMINOUS AND COLOUR
CHARACTERISTICS OF THE LAMP

B-1 TESTS COMMON TO LAMPS OPERATED NOTE — This implies that the source of supply shall have
WITH OR WITHOUT STARTER sufficient power and that the supply circuit shall have sufficiently
low impedance compared with the ballast impedance and care
should be taken that this applies under all conditions that occur
B-1.1 General during the measurements.
Electrical, luminous and colour characteristics of lamps
B-1.2 Lamp Running Current Waveshape
operated without starter, with the exception of
additional of additional test for checking the cathodes, The maximum ratio of peak value to root-mean-square
will be determined by exactly the same methods as for (r.m.s) value shall not exceed 1.7.
those operated with starters.
B-1.3 Electrical, Luminous and Colour
B-1.1.1 Ballasts used for these test shall be reference Characteristics of the Lamps
ballast as specified in IS 1534 (Part 1) and IS 13021
(Part 2). These characteristics shall be measured after
stabilization using the circuit shown in Fig. 6.
B-1.1.2 Before the lamps are subjected to rating test
NOTE — The approximate stabilization period is 15 min. If a
for the first time, they shall be aged for a period of 100
pre-warming position is used, from which the lamp is moved to
h of normal operation. the test position, a further stabilization period is necessary in the
test position. The interruption of the supply should be as short
NOTE — Normal operating condition shall be condition similar
as possible, and the additional stabilization period should be at
to that for life test.
least 5 min.
B-1.1.3 Tests shall be made in a draught-free
B-1.3.1 The voltage at the supply terminals shall be
atmosphere, at an ambient temperature of 25 ± 1º C.
adjusted to the rated value of the reference ballast being
The frequency shall be 50 Hz with a tolerance of
used and the wattage, voltage at lamp terminals, current,
± 0.5 per cent.
luminous flux and colour shall be measured.
B-1.1.4 During the period of stabilization, the supply
B-1.3.2 Potential circuit of instruments connected
voltage should be stable within ± 0.5 percent, this
across a lamp shall not draw more than 3 percent of the
tolerance being reduced to ± 0.2 percent at the moment
nominal running current of the lamps.
of measurement.
B-1.3.3 Instruments connected in series with the lamp
B-1.1.5 The total harmonic content of the supply
shall have sufficiently low impedance such that the
voltage shall not exceed 3 percent. The harmonic
voltage drop shall not exceed 2 percent of the nominal
content is defined as the root-mean-square (r.m.s)
running lamp voltage.
summation of the individual harmonic components,
using the fundamental as 100 percent. B-1.3.4 Instruments shall be essentially free from
waveform errors. When measuring the voltage or power

FIG. 6 TEST C IRCUITS FOR I NITIAL RATING TESTS

10
 IS 2418 (Part 2) : 2018

of the lamp, the potential circuit of the instruments not point. This position of the cold chamber shall be
in use shall be open. During the measuring of the lamp indicated by the manufacturer.
wattage, no correction shall be made for the wattmeter
Measurements shall be made after a sufficient period
consumption (the circuit connection being made on the
of stabilization of the lamp. After stabilization, any lamp
lamp side of the current coil).
movement shall be carried out carefully with no
B-1.3.5 When measuring the luminous flux, the vibration or shock and with the cold chamber always at
potential circuits of the voltmeter and of the wattmeter the lowest point.
shall be open.
B-3.3 Absolute Measurement
NOTE — The reference to the absence of a correction of the
consumption of the voltage circuit of the wattmeter arises from Apart from the conditioning procedure, the rated luminous
an empirical observation which shows that in most case, at the flux measurement is performed as described in B-1.
same supply voltage, the said consumption compensates
approximately for the reduction of the power consumption of the
lamp caused by the parallel connection of the voltage circuit of
B-3.4 Relative Measurement
the wattmeter. The maximum luminous flux measurement is based on
B-2 CATHODE CHARACTERISTICS OF a relative measurement of either luminous flux or of
LAMPS HAVING PREHEATED CATHODE illuminance versus ambient temperature.
OPERATING ON STARTER LESS CIRCUITS B-3.4.1 Equipment for Relative Measurement and
Operating Position
B-2.1 Test Circuit
A thermally insulated container of suitable shape (for
Cathode resistance shall be measured using a suitable
example, a rectangular box) and size shall be used.
d.c. supply or a 50 Hz ac supply.
Alternative: an un-insulated container, located inside a
B-2.2 Lamps for Operation on a.c. Mains temperature-controlled chamber, which is “double-
Frequencies layer” (which allows air to circulate around the container
The voltage at the cathode terminals shall be adjusted without the presence of a draught on the lamp).
to the value of the test voltage given on the relevant The internal temperature of the container shall be
lamp data sheet, and the current shall be measured. From controllable within the temperature range of 20º C to
these, after deduction of the consumption of the 45º C, so that the temperature at which maximum
voltmeter, the cathode resistance shall be determined. luminous flux occurs is included.
B-2.3 Lamps for Operation on High Frequency The inner surface of the container shall be coated with
The current flowing through the cathode shall be adjusted a suitable material dependent upon the applied detection
to the value of the test current given on the relevant lamp method (the recorded signal shall be proportional to
data sheet, and the supply voltage shall be measured. luminous flux or illuminance in the temperature range
From these, after deduction of the voltage across the of measurement).
ammeter, the cathode resistance shall be determined. The lamp shall be mounted in the centre of the container
in a horizontal position. The distance between the lamp
B-3 MEASUREMENT PROCEDURES FOR THE and the walls of the container shall be at least 200 mm
DETERMINATION OF THE MAXIMUM in all directions.
LUMINOUS FLUX OF 16 mm TUBE DIAMETER
LAMPS FOR OPERATION ON HIGH NOTE — If it can be shown that distances less than 200 mm
give the same result, then smaller distances can be used.
FREQUENCY
Electrical connection to the lamp pins shall be made
B-3.1 General using a method which minimizes heat sinking of the
This procedure applies when a requirement is given on lamp (for example, using lamp holders with low thermal
the lamp data sheet concerning maximum luminous flux capacitance or connecting directly to the lamp pins).
at ambient temperatures other than 25º C. The tolerance The temperature within the container shall be measure
of the ambient temperature at which the maximum at a position which is level with the centre of the lamp
luminous flux shall be obtained is given on the relevant in the vertical plane, equidistant between the lamp ends
lamp data sheet. in the horizontal plane and equidistant between the lamp
B-3.2 Conditioning of the Lamp and container wall.
NOTE — In practice, an additional measurement point at the
The lamp shall be aged for 100 h in a vertical position. control point of the lamp is advised (in the vicinity of the cold
During ageing the cold chamber shall be at the lowest chamber which determines the mercury vapour pressure).

11
IS 2418 (Part 2) : 2018

A suitable light detector (thermally insulated and/or relative measurements will provide a complete
stabilized) shall be mounted outside the container or inside luminous flux versus ambient temperature profile for
the container if its temperature dependence is known. For the lamp.
luminous flux measurements, the light detector shall receive
light via reflection only with the direct light being blocked B-4 MEASUREMENT OF COLOUR
by a baffle. For illuminance measurements, the light CHROMATICITY CO-ORDINATES
detector shall receive light directly from the lamp.
B-4.1 Procedure
The recorded signal from the detector shall be
Measurement of colour may be made with a five-cell
proportional to the luminous flux or the illuminance in
type colorimeter and a calibrated lamp of the same
the temperature range of measurement.
spectral energy distribution as the lamp to be tested.
B-3.4.2 Execution of Relative Measurements This type of colorimeter is most commonly used due to
its simplicity and speed of operation.
The lamp shall be tested in the appropriate circuit given
in Fig. 7. The reference ballast shall be positioned The five-cell type colorimeter usually consists of an
outside the container. After starting, the supply voltage assembly of photo-cells, colour filters and diaphragms
of the reference ballast shall be held constant throughout shielded by a box-like enclosure. The external resistance
the measurement. of photo-cell circuit shall be preferably less than 1 Ù.
The filtered cells and diaphragms are mounted in the
There shall be no artificial air movement in the container.
enclosure, approximately 50 cm from its viewing
However, air ventilation is needed in order to obtain an
aperture. The aperture should be such that the cells’
isotropic temperature distribution.
view the full diameter of the fluorescent tube under test
The measurement shall start at the lowest temperature and about 25 cm of its centre section. The distance from
of interest. It is recommended that the rate of temperature the plane of the aperture to the centre line of the lamps
rise in the range of 20º C to 45º C be less than 5K/h. is of the order of 5 cm. Y and Z components can be
NOTE — This is required in order to achieve reproducible results
measured with one filtered cell each. The X component
with minimum measurement uncertainties requires three such cells in parallel to obtain the
theoretical X values. Diaphragms in front of the cells
Measurements of the luminous flux or illuminance and permit adjustment of the ratio of their responses. Cell
the ambient temperature shall be made in suitable output for the X, Y and Z values may be read on a
temperature/time intervals throughout the period of micrometer of a current balance.
measurement.
NOTE — The calibrated lamp should be checked before testing
B-3.5 Translation into Absolute Values by comparing with another stored spare calibrated lamp (same
colour and wattage) and the difference of each value should be
Combining the absolute measurement with the less than 2 percent.

FIG. 7 CIRCUIT DIAGRAM FOR MEASUREMENT OF ELECTRICAL AND PHOTOMETRIC C HARACTERISTICS FOR
LAMPS FOR O PERATION ON HIGH FREQUENCY

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 IS 2418 (Part 2) : 2018

ANNEX C
(Clause 7.7)
CHROMATICITY CO-ORDINATES

C-1 GENERAL "Colour" g11 g12 g22

This Annex covers the standardized rated values and F 6500 86 × 104 –40 × 104 45 × 104
tolerance areas for the chromaticity co-ordinates x and F 5000 56 × 104 –25 × 104 28 × 104
y applying to fluorescent lamps.
F 4000 39.5 × 104 –21.5 × 104 26 × 104
For lamps with non-standardized chromaticity co-
F 3500 38 × 104 –20 × 104 25 × 104
ordinates, the rated values shall be assigned by the
manufacturer or responsible vendor. F 3000 39 × 104 –19.5 × 104 27.5 × 104
NOTE — The chromaticity co-ordinates x and yare specified F 2700 44 × 104 –18.6 × 104 27 × 104
according to the CIE 1931 Standard Colorimetric System (see
CIE Publication 15-2) IJ. The tolerance areas are based on the
ellipses defined by D.L. MacAdam in his paper “Specification For θ, a and b, the following values shall apply:
of small chromaticity differences”, published in the Journal of
the Optical Society of America, vol.l, No.1, Jan. 1943, pp 18-26. "Colour" θ a b
The tolerance areas are defined by MacAdam ellipses F 6500 58° 23' 0.002 23 0.000 95
of 5 SDCM (standard deviation of colour matching). F 5000 59° 37' 0.002 74 0.001 18
Co-ordinates 5 SDCM away from the rated values are
F 4000 54° 00' 0.003 13 0.001 34
given by the equation:
F 3500 52° 58' 0.003 17 0.001 39
g11 ∆x² + 2 g12 ∆x ∆y + g22 ∆y² = 5²
F 3000 53° 10' 0.002 78 0.001 36
where, ∆x and ∆y represent the deviations with respect
to the rated co-ordinates, while the coefficients g11,g12 F 2700 57° 17' 0.002 58 0.001 37
and g22 depend on these rated values. These co-efficients
are the basis for calculating θ, a and b, where θ is the The tolerance areas are shown in Fig. 8, Fig. 9, Fig. 10,
angle between the major axis of the ellipse and the x- Fig. 11, Fig. 12 and Fig. 13 together with the rated
axis, and a and b are the major and minor semi-axes of values a part of the black body locus and lines of
an ellipse of 1 SDCM. constant correlated colour temperature.
C-2 STANDARD CHROMATICITY CO-ORDINATES C-3 SHIFTED CHROMATICITY CO-ORDINATES
For the standardized chromaticity co-ordinates the
For some lamps as specified on the relevant lamp data
following rated values x and y apply for the different
sheet slightly shifted chromaticity coordinates apply but
lamp “colours” (with the correlated colour temperatures
only for types having a general colour rendering index
Tc in Kelvin given as extra information):
less than 80. The same tolerance areas as given in Fig. 9
"Colour" Tc x y shall be used but centered on the rated values given
F 6500 6 400 0.313 0.337 below:
F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380 "Colour" x y
F 3500 3 450 0.409 0.394 F 6500 0.309 0.337
F 3000 2 940 0.440 0.403 F 5000 0.342 0.359
F 2700 2 720 0.463 0.420 F 4000 0.375 0.380
F 3500 0.403 0.394
For the coefficients g11, g12 and g22, the following values F 3000 0.433 0.403
shall apply:
F 2700 — —

13
IS 2418 (Part 2) : 2018

FIG. 8 TOLERANCE AREA FOR STANDARD “C OLOUR” F 6500

14
 IS 2418 (Part 2) : 2018

FIG. 9 TOLERANCE AREA FOR STANDARD “C OLOUR” F 5000

15
IS 2418 (Part 2) : 2018

FIG. 10 TOLERANCE AREA FOR S TANDARD “COLOUR” F 4000

16
 IS 2418 (Part 2) : 2018

F IG. 11 TOLERANCE AREA FOR STANDARD “COLOUR” F 3500

17
IS 2418 (Part 2) : 2018

FIG. 12 TOLERANCE AREA FOR S TANDARD “COLOUR” F 3000

18
 IS 2418 (Part 2) : 2018

FIG. 13 TOLERANCE AREA FOR STANDARD “C OLOUR” F 2700

19
IS 2418 (Part 2) : 2018

ANNEX D
(Clause 7.1)
METHOD OF TEST FOR LUMEN MAINTENANCE AND LIFE

D-1 GENERAL When the ballast, at its rated voltage is associated with
a test lamp, the lamp shall dissipate a power which does
The luminous flux at a given time in the life of a lamp
not differ from its rated value by more than 4 percent.
shall be measured as specified in Annex B. During the
A test lamp is a lamp whose voltage at lamp terminals
life testing, lamps shall be operated as follows:
does not deviate by more than 2 percent from its rated
a) lamps shall be operated at an ambient value, when operated with its reference ballast.
temperature of between 15 °C and 50 °C. NOTE — The choice of the type of ballasts for these tests is left
Excessive draughts shall be avoided and the open, but the type used can have an influence on the results of
lamps shall not be subject to extreme vibration the test. It is recommended that the type of ballast employed
and shock; should be stated. In case of doubt, the use of an inductive type of
ballast is recommended because such a type has the smallest
b) lamps shall be operated in a horizontal number of parameters capable of affecting the results.
position;
For lamps operated with a starter the preheating current,
c) the connections of the lamp contacts with
at rated supply voltage shall not differ by more than 10
reference to the terminations of the ballast shall
percent from the rated value specified on the relevant lamp
not be changed for the whole course of the
data sheet. For lamps operated with a starter, the type of
tests;
starter to be used shall comply with the requirements of
d) lamps shall be operated in the circuit for which IS 2215 and shall in any case be subject to agreement with
they are intended by the manufacturer; and the lamp manufacturer or responsible vendor.
e) lamps shall be switched off for 15 min after
each 2 h 45 min of operation. During the life testing, the supply voltage and frequency
shall not differ by more than 2 percent from the rated
D-2 LAMPS FOR OPERATION ON a.c. MAINS voltage and frequency of the ballast used.
FREQUENCIES
D-3 LAMPS FOR OPERATION ON HIGH
The ballast used shall comply with the requirements of FREQUENCY
IS 1534 (Part 1). For capacitive circuits additionally
the capacitor used shall comply with the requirements The ballast used shall comply with the requirements of
of IS 15967 (Part 2) : 2013. IS 13021 (Part 2).

20
 IS 2418 (Part 2) : 2018

ANNEX E
(Clause 6.7)
BALLSTS AND STARTERS TO BE USED FOR TESTS

E-1 BALLASTS FOR STARTING TESTS AND E-1.1.3 For lamps operating with a starter, the
LIFE TESTS preheating current (short-circuit current) at rated
voltage shall not differ by more than ±10 percent from
E-1.1 A ballast used for the starting tests shall comply
the nominal value specified in the appropriate data sheet.
with the requirements of E-1.1.1 and E-1.1.2 and life
testing shall comply with the following requirements E-1.1.4 For lamps with preheated cathodes operating
of E-1.1.1 to E-1.1.4. without starter, requirements are under consideration.
E-1.1.1 It shall be of a type that complies with IS 1534 E-2 STARTERS
(Part 1), except where otherwise stated on the relevant
lamp data sheet and shall correspond with the starting E-2.1 Starters used for life testing of lamp shall comply
conditions of the lamp. with IS 2215.

E-1.1.2 When at its rated voltage, it is associated with E-3 BALLASTS FOR HIGH FREQUENCY
a lamp whose voltage at lamp terminals does not deviate LUMEN MAINTENANCE TEST
by more than ± 2 percent from the objective value
For lamps which can only be operated on high frequency
specified on the relevant lamp data sheet the lamp shall
supplies, the ballast shall comply with IS 13021.
absorb a power which does not differ from its objective
value by more than ± 4 percent.

ANNEX F
(Clause 8.5)
INFORMATION FOR LUMINAIRE DESIGN

F-1 GENERAL In order to satisfy the requirements specified on the

In order to safeguard proper functioning of the lamp, relevant lamp data sheets either the capacitor
the relevant information given in this Annex should be tolerance should be narrow or the capacitor and the
taken into account when designing luminaires. inductive reactance component of the ballast should
be selected so that unfavourable tolerances do not
F-2 FREE SPACE coincide.
For mechanical acceptance of lamps complying with F-4 STARTING AID
this standard, a free space should be provided in the
luminaire, based on the maximum lamp dimensions Operation of lamps on a.c. mains or high frequency
specified on the relevant lamp data sheet. starterless circuits requires in most cases the presence
of a conductive starting aid at earth potential. This can
F-3 SERIES CAPACITORS USED IN be a conventional part of the luminaire.
CAPACITIVE CIRCUITS
The distance between the surface of the lamp and the
An initial capacitor tolerance of 10 percent which is starting aid should not exceed the value specified for
typical for shunt connected capacitors is unsuitable for the lamp starting characteristics on the relevant lamp
series capacitors. The summation of capacitor and data sheet. In addition a minimum distance of 3 mm
ballast tolerances may lead to poor lamp performance should be observed.
when unfavourable tolerances coincide.

21
IS 2418 (Part 2) : 2018

ANNEX G
(Clause 8.6.3)
LAMP DATA SHEETS

G-1 LIST OF LAMP DATA SHEETS

Sheet Nominal Frequency Nominal Cap Circuit
No. Wattage Dimensions a.c. Mains High Cathode
IS Frequency Type
2418 W Hz mm
2220 (1) 18 50 26 × 600 G 13 Starter – Preheated
2220 (2) 18HL 50 26 × 600 G 13 Starter – Preheated
2420 (1) 36 50 26 × 1200 G 13 Starter – Preheated
2420 (1) 36HL 50 26 × 1200 G 13 Starter – Preheated
2520 58 50 26 × 1500 G 13 Starter – Preheated
2540 65 50 38 × 1500 G 13 Starter – Preheated
2660 80 50 38 × 1500 G 13 Starter – Preheated
4660 80 50 38 × 1500 G 13 Starterless – Preheated,
– high
resistance
5540 65 50 38 × 1500 G 13 Starterless – Preheated,
low
resistance
6520 14 20 K 16 × 550 G5 – Starterless Preheated
6530 21 20 K 16 × 850 G5 – Starterless Preheated
6620 24 20 K 16 × 550 G5 – Starterless Preheated
6640 28 20 K 16 × 1 150 G5 – Starterless Preheated
6650 35 20 K 16 × 1 450 G5 – Starterless Preheated
6730 39 20 K 16 × 850 G5 – Starterless Preheated
6750 49 20 K 16 × 1 450 G5 – Starterless Preheated
6840 54 20 K 16 × 1 150 G5 – Starterless Preheated
6850 80 20 K 16 × 1 450 G5 – Starterless Preheated

22
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
18 With Starter Preheated G13 26 × 600
Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
589.8 594.5 596.9 604.0 28.0
Starting Characteristics
Frequency Ballast Rated Voltage Test Voltage (r.m.s) Starting Time
Hz V V s
50 110 103.5 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Rated Preheat
Wattage V Current Current
Hz W A A
Rated Minimum Maximum
50 18 57 50 64 0.370 0.550
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power Factor
Wattage Voltage Current Ratio
Hz W V A Ώ

50 20 127 0.370 270 0.12

Information for Ballast Design
Frequency Hz 50
Preheat cathode current A Minimum 0.333
Maximum 0.800
Open circuit voltage across starter V Minimum (r.m.s) 103.5
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 50

Voltage across starter with lamp operating V Maximum (r.m.s.) 68
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
800 70

2418-IS-2220 (1)

23
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 1 015
4300 K 1 120

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 85 percent
At 70 percent life 80 percent

24
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
18 HL With Starter Preheated G13 26 × 600
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

589.8 594.5 596.9 604.0 28.0
Starting Characteristics
Frequency Ballast Rated Voltage Test Voltage (r.m.s) Starting Time
Hz V V s
50 110 103.5 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Rated Preheat
Wattage V Current Current
Hz W A A
Rated Minimum Maximum
50 18 57 50 64 0.370 0.550
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power Factor
Wattage Voltage Current Ratio
Hz W V A Ώ

50 20 127 0.370 270 0.12

Information for Ballast Design
Frequency Hz 50
Preheat cathode current A Minimum 0.333
Maximum 0.800
Open circuit voltage across starter V Minimum (r.m.s) 103.5
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 50

Voltage across starter with lamp operating V Maximum (r.m.s.) 68
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
800 70

2418-IS-2220 (2)

25
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 1 250
4000 K 1 300
2700 K 1 300

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

26
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
36 With Starter Preheated G13 26 × 1 200
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 199.4 1 204.1 1 206.5 1 213.6 28.0
Starting Characteristics
Frequency Ballast Rated Voltage Test Voltage (r.m.s) Starting Time
Hz V V s
50 220 198 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Rated Preheat
Wattage V Current Current
Hz W A A
Rated Minimum Maximum
50 36 103 93 113 0.430 0.650
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power Factor
Wattage Voltage Current Ratio
Hz W V A Ώ

50 40 220 0.430 390 0.10

Information for Ballast Design
Frequency Hz 50
Preheat cathode current A Minimum 0.387
Maximum 0.904
Open circuit voltage across starter V Minimum (r.m.s) 198
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 40

Voltage across starter with lamp operating V Maximum (r.m.s.) 128
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
800 140

2418-IS-2420 (1)

27
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 2 425
4300 K 2 700

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 85 percent
At 70 percent life 80 percent

28
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
36 HL With Starter Preheated G13 26 × 1 200
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 199.4 1 204.1 1 206.5 1 213.6 28.0
Starting Characteristics
Frequency Ballast Rated Voltage Test Voltage (r.m.s) Starting Time
Hz V V s
50 220 198 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Rated Preheat
Wattage V Current Current

Rated Minimum Maximum

Hz W A A

50 36 103 93 113 0.430 0.650

Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power Factor
Wattage Voltage Current Ratio
Hz W V A Ώ

50 40 220 0.430 390 0.10

Information for Ballast Design

Frequency Hz 50
Preheat cathode current A Minimum 0.387
Maximum 0.904
Open circuit voltage across starter V Minimum (r.m.s) 198
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 40

Voltage across starter with lamp operating V Maximum (r.m.s.) 128
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
800 140

2418-IS-2420 (2)

29
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 3 100
4000 K 3 200
2700 K 3 200

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

30
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
58 With Starter Preheated G13 26 × 1500
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 500.0 1 504.7 1 507.1 1 514.2 28.0
Starting Characteristics
Frequency Ballast Rated Voltage Test Voltage (r.m.s) Starting Time
Hz V V s
50 220 198 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Rated Preheat
Wattage V Current Current
Hz W A A
Rated Minimum Maximum
50 58 110 100 120 0.670 1.000
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power Factor
Wattage Voltage Current Ratio
Hz W V A Ώ

50 65 220 0.670 240 0.10

Information for Ballast Design
Frequency Hz 50
Preheat cathode current A Minimum 0.603
Maximum 1.410
Open circuit voltage across starter V Minimum (r.m.s) 198
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 25

Voltage across starter with lamp operating V Maximum (r.m.s.) 132
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
900 140

2418-IS-2520

31
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 3 930
4300 K 4 400

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 85 percent
At 70 percent life 80 percent

32
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
65 With Starter Preheated G13 38 × 1 500
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 500.0 1 504.7 1 507.1 1 514.2 40.5
Starting Characteristics
Frequency Ballast Rated Voltage Test Voltage (r.m.s) Starting Time
Hz V V s
50 220 198 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Rated Preheat
Wattage V Current Current
Hz W A A
Rated Minimum Maximum
50 64 110 100 120 0.670 1.000
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power Factor
Wattage Voltage Current Ratio
Hz W V A Ώ

50 65 220 0.670 240 0.10

Information for Ballast Design

Frequency Hz 50
Preheat cathode current A Minimum 0.603
Maximum 1.410
Open circuit voltage across starter V Minimum (r.m.s) 198
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 25

Voltage across starter with lamp operating V Maximum (r.m.s.) 132
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
400 140

2418-IS-2540

33
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 3 930
4300 K 4 400
2900 K 4 600

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 85 percent
At 70 percent life 80 percent

34
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
80 With starter Preheated G13 38 × 1 500
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 500.0 1 504.7 1 507.1 1 514.2 40.5
Starting Characteristics
Frequency Ballast Rated Test Voltage (r.m.s) Starting Time
Hz Voltage V s
V
50 240 198 30
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Rated Lamp Rated
Wattage Lamp Terminals Current Preheat
W A Current
Hz V
A
Rated Minimum Maximum
50 76 99 89 109 0.870 1.300
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power
Wattage Voltage Current Ratio Factor
Hz W V A Ώ

50 80 240 0.865 223 0.06

Information for Ballast Design
Frequency Hz 50
Preheat cathode current A Minimum 0.790
Maximum (r.m.s.) 1.830
Open circuit voltage across starter V Minimum 198
Open circuit voltage across lamp V Maximum (peak) 400

Substitution resistor for both cathodes in series Ώ 25

Voltage across starter with lamp operating V Maximum (r.m.s.) 128
Information for Starter Design
Pulse Voltage Non-reclosure Voltage
V V
Minimum Maximum
400 140

2418-IS-2660

35
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 4 330
4300 K 5 000
2900 K 5 200

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 80 percent
At 70 percent life 75 percent

36
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
80 Starterless Preheated, high resistance G13 38 × 1 500
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 500.0 1 504.7 1 507.1 1 514.2 40.5
Starting Characteristics
Frequency Ballast Ballast Rated Starting Aid Cathode Open Starting
Nominal Voltage Distance Voltage Circuit Time
Wattage (r.m.s.) (r.m.s.)
Hz W W mm V V s
50 80 240 13 8.0 220 10
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Rated Lamp Current
Wattage Lamp Terminals
V
Hz W Rated Minimum Maximum A
50 76 99 89 109 0.870
Cathode Characteristics
Cathode Test Voltage (r.m.s.) Resistance of Each Cathode
V Ώ
Rated Minimum
High resistance 8.0 12 9
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /Current Power
Wattage Voltage Current Ratio Factor
Hz W V A Ώ
50 80 240 0.865 223 0.06
Information for Ballast Design
Frequency Hz 50
Preheat cathode voltage V Minimum (r.m.s) 6.5
Maximum (r.m.s.) 11.0
Open circuit voltage across lamp V Minimum (r.m.s) 220
Maximum (peak) 475

Substitution resistor for each cathode Ώ 11

Voltage to starting aid V Maximum (peak) *
Current in any lead to cathodes A Maximum 1 600
*Under consideration

2418-IS-4660

37
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 4 330
4300 K 5 000
2900 K 5 200

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 80 percent
At 70 percent life 75 percent

38
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
65 Starterless Preheated, low G13 38 × 1 500
resistance
Dimensions, mm
A B C D

Maximum Minimum Maximum Maximum Maximum

1 500.0 1 504.7 1 507.1 1 514.2 40.5
Starting Characteristics
Frequency Ballast Ballast Starting Aid Cathode Open Circuit Starting
Nominal Rated Distance Voltage Voltage Time
Wattage Wattage mm (r.m.s.) (r.m.s.)
Hz V V V V s
50 65 220 13 3.05 220 10
Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Rated Lamp Current
Wattage Lamp Terminals
V
Hz W Rated Minimum Maximum A
50 64 110 100 120 0.670
Cathode Characteristics
Cathode Test voltage (r.m.s.) Resistance of each cathode
Ώ
Rated Minimum
Low resistance 3.6 6 4
Reference Ballast Characteristics
Frequency Nominal Rated Calibration Voltage /current Power Factor
Wattage Voltage current ratio
Hz W V A Ώ
50 65 220 0.670 240 0.10
Information for Ballast Design
Frequency Hz 50
Preheat cathode voltage V Minimum (r.m.s) 3.05
Maximum (r.m.s.) 5.5
Open circuit voltage across lamp V Minimum. (r.m.s) 220
Maximum (peak) 475
Substitution resistor for each cathode Ώ 6
Voltage to starting aid V Minimum (peak.) *
Current in any lead to cathodes A Maximum 1.100
* Under consideration
2418-IS-5540

39
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 3 930
4300 K 4 400
2900 K 4 600

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 80 percent
At 70 percent life 75 percent

40
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
14 HF starterless Preheated G5 16 × 550

Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
549.0 553.7 556.1 563.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Current Preheat Time Open Circuit Starting Time
Distance A s Voltage
kHz mm (r.m.s.) s
V

20 – 26 6 0.210 2 230 0.1

Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Rated Lamp Current
Wattage Terminals A
V

kHz Rated Minimum Maximum

20 – 26 14.0 86 76 96 0.165
Chromaticity coordinates: see B-2

"Colour" Tc x y
F 6500 6 400 0.313 0.337
F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380
F 3500 3 450 0.409 0.394
F 3000 2 940 0.440 0.403
F 2700 2 720 0.463 0.420

The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.
Cathode Characteristics
Test Current Resistance of Each Cathode

Rated Minimum Maximum

0.160 40 30 50

2418-IS-6520

41
IS 2418 (Part 2) : 2018

Reference Ballast Characteristics

Frequency Nominal Rated Voltage Calibration Resistance
Wattage V Current 
Hz W A
20 – 26 14 167 0.170 500
Information for High Frequency Ballast Design
Frequency kHz  20
Current in any lead to cathodes A Maximum 0.220
Lamp operating current A Minimum 0.130
Maximum 0.205
Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 0.9
Minimum cathode preheat energy : Emin = Qmin + Pmin ts
Pmin (W) 0.8
Voltage across each cathode for E(t) < Emin Maximum (r.m.s.) 11

Substitution resistor for each cathode. for testing minimum cathode preheat requirements  30
Maximum cathode preheat energy : Emax = Qmax + Pmax ts Qmax (J) 1.8
Pmax (W) 1.5
Substitution resistor for each cathode. for testing maximum cathode preheat requirements  40
Non-ignition voltage t  ts Maximum (r.m.s.) 130
Open circuit voltage across lamp V t > ts (+10 °C) Minimum (r.m.s.) 230
Ignition voltage
t > ts (-15 °C) Minimum (r.m.s.) 275
Non-ignition voltage t  ts Maximum (peak) *
Voltage to starting aid V
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  30 -
90
Starting Requirements Without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current Maximum *
Typical Characteristics for a Lamp at 35 ?C Ambient Temperature
Lamp Wattage Lamp Voltage Lamp Current
W V A
13.7 82 0.170
* Under consideration
2418-IS-6520

42
 IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 1 100
4000 K 1 200
2700 K 1 200

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

43
IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
21 HF starterless Preheated G5 16 × 850
Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
849.0 853.7 856.1 863.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Current Preheat Time Open Circuit Starting time
Distance Voltage
kHz mm A s (r.m.s.) s
V
20 – 26 6 0.210 2 350 0.1

Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current
V
kHz W Rated Minimum Maximum A
20 – 26 20.6 126 116 136 0.165
Chromaticity coordinates: see B-2.
"Colour" Tc x y

F 6500 6400 0.313 0.337

F 5000 5000 0.346 0.359
F 4000 4040 0.380 0.380
F 3500 3450 0.409 0.394
F 3000 2940 0.440 0.403
F 2700 2720 0.463 0.420
The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.
Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.160 40 30 50
Reference Ballast Characteristics
Frequency Nominal Wattage Rated Voltage Calibration Current Resistance
kHz W V A
20 – 26 21 246 0.170 725

2418-IS-6530

44
 IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz  20
Current in any lead to cathodes Maximum 0.220
Minimum 0.130
Lamp operating current
Maximum 0.205
Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 0.9
Minimum cathode preheat energy : Emin = Qmin + Pmin ts
Pmin (W) 0.8
Voltage across each cathode for E(t) < Emin Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements 30
Qmax (J) 1.8
Maximum cathode preheat energy : Emax = Qmax + Pmax ts
Pmax (W) 1.5
Substitution resistor for each cathode. for testing maximum cathode preheat requirements 40
Non-ignition t Maximum (r.m.s.) 200
Open circuit voltage across lamp l
t > ts (+10 Minimum (r.m.s.) 340
Ignition voltage
t > ts (-15 Minimum (r.m.s.) 390
Non-ignition t Maximum (peak) *
Voltage to starting aid l
Ignition voltage t> Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements 30 - 90
Starting Requirements without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor Ω *
Substitution resistor for each cathode Ω *
Cathode current A Maximum *
Typical Characteristics for a Lamp at 35°C Ambient Temperature
Lamp Wattage Lamp Lamp Current
Voltage A
W
V
20.7 123 0.170
2418-IS-6530

45
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 1 750
4000 K 1 850
2700 K 1 850
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

46
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
24 HF starterless Preheated G5 16 × 550
Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
549.0 553.7 556.1 563.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Preheat Time Open Circuit Starting Time
Distance mm Current Voltage
kHz s (r.m.s.) s
A V
20 – 26 6 0.440 2 250 0.1
Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current
V
Rated Minimum Maximum
kHz W A
20 – 26 22.5 77 69 85 0.295
Chromaticity coordinates: see B-2.

"Colour" Tc x y
F 6500 6 400 0.313 0.337
F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380
F 3500 3 450 0.409 0.394
F 3000 2 940 0.440 0.403
F 2700 2 720 0.463 0.420
The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.
Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.350 12 9 15
Reference Ballast Characteristics
Frequency Nominal Wattage Rated Voltage Calibration Current Resistance
kHz W V A
20-26 24 150 0.300 250
Information for High Frequency Ballast Design
Frequency kHz  20
Current in any lead to cathodes Maximum 0.450*
Lamp operating current Minimum 0.260
Maximum 0.425

2418-IS-6620

47
IS 2418 (Part 2) : 2018

Starting Requirements with Cathode Preheating, For Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 1.5
Minimum cathode preheat energy : Emin = Qmin + Pmin ts
Pmin (W) 0.9
Voltage across each cathode for E(t) < Emin Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements  8.0
Q max (J) 2.5
Maximum cathode preheat energy : Emax = Qmax + Pmax ts Pmax (W) 1.8
Substitution resistor for each cathode. for testing maximum cathode preheat requirements  10.5
Non-ignition voltage t  ts Maximum (r.m.s.) 130
Open circuit voltage across lamp V t > ts (+10 °C) Minimum (r.m.s.) 280
Ignition voltage
t > ts (–15 °C) Minimum (r.m.s.) 350
Non-ignition voltage t  ts Maximum (peak) *
Voltage to starting aid V
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  8 – 24

Starting Requirements Without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *
Typical Characteristics for a Lamp at 35°C Ambient Temperature
Lamp Wattage Lamp Voltage Lamp Current
W V A
22.5 75 0.300
* Under consideration

2418-IS-6620

48
 IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 1 650
4000 K 1 750
2700 K 1 750

Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

49
IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
28 HF Starterless Preheated G5 16 × 1 150

Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
1 149.0 1 153.7 1 156.1 1 163.2 17.0

Starting Characteristics
Frequency Starting Aid Preheat Preheat Time Open Circuit Starting Time
Distance mm Current Voltage
kHz s (r.m.s.) S
A V
20 – 26 6 0.210 2 375 0.1

Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current
V
Rated Minimum Maximum A
kHz W
20 – 26 27.9 166 149 183 0.170

Chromaticity coordinates: see B-2.

“Colour” Tc x y

F 6500 6400 0.313 0.337

F 5000 5000 0.346 0.359
F 4000 4040 0.380 0.380
F 3500 3450 0.409 0.394
F 3000 2940 0.440 0.403
F 2700 2720 0.463 0.420

The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.
Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.160 40 30 50
Reference Ballast Characteristics
Frequency Nominal Rated Voltage Calibration Current Resistance
Wattage
kHz W V A
20 – 26 28 329 0.170 950

2418-IS-6640

50
 IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz kHz  20
Current in any lead to cathodes A Maximum 0.220
Lamp operating current A Minimum 0.130
Maximum 0.205
Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 0.9
Minimum cathode preheat energy : Emin = Qmin + Pmin ts J
Pmin (W) 0.8
Voltage across each cathode for E(t) < Emin V Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements  30
Qmax (J) 1.8
Maximum cathode preheat energy : Emax = Qmax + Pmax ts J
Pmax (W) 1.5
Substitution resistor for each cathode, for testing maximum cathode preheat requirements  40
Non-ignition voltage t  ts Maximum (r.m.s.) 240
Open circuit voltage across lamp V t > ts (+10 °C) Minimum (r.m.s.) 425
Ignition voltage
t > ts (-15 °C) Minimum (r.m.s.) 530
Non-ignition voltage t  ts Maximum (peak) *
Voltage to starting aid V
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  30 - 90
Starting Requirements without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *
Typical Characteristics for a Lamp at 35°C Ambient Temperature
Lamp Wattage Lamp Voltage Lamp Current
W V A
27.8 167 0.170
* Under consideration.

2418-IS-6640

51
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 2 400
4000 K 2 550
2700 K 2 550
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

52
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
35 HF starterless Preheated G5 16 × 1 450

Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
1 449.0 1 453.7 1 456.1 1 463.2 17.0

Starting Characteristics
Frequency Starting Aid Preheat Preheat Time Open Circuit Starting Time
Distance Current Voltage
(r.m.s.)
kHz mm A s V S
20 – 26 6 0.210 2 450 0.1

Electrical Characteristics
Frequency Rated Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current
Wattage V
Rated Minimum Maximum
kHz W A
20 – 26 34.7 205 185 225 0.175
Chromaticity coordinates: see B-2.
“Colour” Tc x y

F 6500 6 400 0.313 0.337

F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380
F 3500 3 450 0.409 0.394
F 3000 2 940 0.440 0.403
F 2700 2 720 0.463 0.420
The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.
Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.160 40 30 50

Reference Ballast Characteristics

Frequency Nominal Rated Voltage Calibration Resistance
Wattage Current

kHz W V A
20 - 26 35 413 0.170 1 200

2418-IS-6650

53
IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz kHz  20
Current in any lead to cathodes Maximum 0.220
Lamp operating current Minimum 0.130
Maximum 0.205

Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 0.9
Minimum cathode preheat energy : Emin = Qmin + Pmin ts
Pmin (W) 0.8
Voltage across each cathode for E(t) < Emin Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements  30
Qmax (J) 1.8
Maximum cathode preheat energy : Emax = Qmax + Pmax ts
Pmax (W) 1.5
Substitution resistor for each cathode. for testing maximum cathode preheat requirements  40
Non-ignition voltage t  ts Maximum (r.m.s.) 275
Open circuit voltage across lamp V t > ts (+10 °C) Minimum (r.m.s.) 530
Ignition voltage
t > ts (-15 °C) Minimum (r.m.s.) 700
Non-ignition voltage t  ts Maximum (peak) *
Voltage to starting aid V
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  30- 90

Starting Requirements Without Cathode Preheating, For Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *

Typical Characteristics for a Lamp at 35 °C Ambient Temperature

Lamp Wattage Lamp Voltage Lamp Current
W V A
34.7 209 0.170
* Under consideration.

2418-IS-6650

54
 IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 3 000
4000 K 3 250
2700 K 3 250
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

55
IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
39 HF starterless Preheated G5 16 × 850
Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
849.0 853.7 856.1 863.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Preheat Time Open Circuit Starting Time
Distance Current Voltage
(r.m.s.)
kHz mm A s V s
20 – 26 6 0.440 2 350 0.1
Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current
V
Rated Minimum Maximum
kHz W A
20 – 26 38 118 108 128 0.325
Chromaticity coordinates: see B-2.
"Colour" Tc x y

F 6500 6400 0.313 0.337

F 5000 5000 0.346 0.359
F 4000 4040 0.380 0.380
F 3500 3450 0.409 0.394
F 3000 2940 0.440 0.403
F 2700 2720 0.463 0.420

The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.

Cathode Characteristics
Test Current Resistance of each cathode
Rated Minimum Maximum
0.350 12 9 15
Reference Ballast Characteristics
Frequency Nominal Rated Voltage Calibration Resistance
Wattage Current

kHz W V A

20 - 26 39 224 0.340 330

2418-IS-6730

56
 IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz  20
kH
Current in any lead to cathodes A Maximum 0.450*
Lamp operating current A Minimum 0.260
Maximum 0.425
Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 1.5
Minimum cathode preheat energy : Emin = Qmin + Pmin ts
Pmin (W) 0.9
Voltage across each cathode for E(t) < Emin Maximum r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements  8.0
Qmax (J) 2.5
Maximum cathode preheat energy : Emax = Qmax + Pmax ts
Pmax (W) 1.8
Substitution resistor for each cathode. for testing maximum cathode preheat requirements  10.5
Open circuit voltage across lamp V Non-ignition voltage t  ts Maximum r.m.s.) 175
t > ts (+10 °C) Minimum (r.m.s.) 350
Ignition voltage
t > ts (-15 °C) Minimum (r.m.s.) 390
Voltage to starting aid V Non-ignition voltage t  ts Maximum (peak) *
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  8 - 24
Starting Requirements Without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *
Typical Characteristics for a Lamp at 35°C Ambient Temperature
Lamp Wattage Lamp voltage Lamp current

W V A
38.0 112 0.340
* Under consideration
2418-IS-6730

57
IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 2 850
4000 K 3 100
2700 K 3 100
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

58
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
49 HF Starterless Preheated G5 16 × 1 450

Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
1 449.0 1 453.7 1 456.1 1 463.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Current Preheat Time Open Circuit Starting Time
Distance Voltage
kHz mm A s (r.m.s.) s
V
20 – 26 6 0.330 2 450 0.1
Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current
V
Rated Minimum Maximum
kHz W A
20 – 26 49.2 195 175 215 0.255
Chromaticity coordinates: see B-2.
"Colour" Tc x y

F 6500 6 400 0.313 0.337

F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380
F 3500 3 450 0.409 0.394
F 3000 2 940 0.440 0.403
F 2700 2 720 0.463 0.420

The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.

Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.260 16.5 12.4 20.6

Reference Ballast Characteristics

Frequency Nominal Rated Voltage Calibration Resistance
Wattage Current

kHz W V A
20 - 26 49 390 0.255 765

2418-IS-6750

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IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz kHz  20
Current in any lead to cathodes Maximum 0.330
Lamp operating current Minimum 0.180
Maximum 0.295
Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 1.1
Minimum cathode preheat energy : Emin = Qmin + Pmin ts
Pmin (W) 0.9
Voltage across each cathode for E(t) < Emin Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements 12.0
Qmax (J) 2.2
Maximum cathode preheat energy : Emax = Qmax + Pmax ts
Pmax (W) 1.8
Substitution resistor for each cathode. for testing maximum cathode preheat requirements 16.0
Open circuit voltage across lamp V Non-ignition voltage t  ts Maximum (r.m.s.) 225
t > ts (+10 °C) Minimum (r.m.s.) 450
Ignition voltage
t > ts (–15 °C) Minimum (r.m.s.) 625
Voltage to starting aid V Non-ignition voltage t  ts Maximum (peak) *
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements 12 - 36
Starting Requirements Without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *
Typical Characteristics for a Lamp at 35°C Ambient Temperature
Lamp Wattage Lamp Voltage Lamp Current

W V A
49.3 191 0.260
* Under consideration
2418-IS-6750

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 IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 4 050
4000 K 4 300
2700 K 4 300
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

61
IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
54 HF starterless Preheated G5 16 × 1 150
Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
1 149.0 1 153.7 1 156.1 1 163.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Preheat Time Open Circuit Starting Time
Distance Current Voltage
kHz mm s (r.m.s.) s
A V
20 – 26 6 0.720 2 520 0.1
Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current

V
kHz W Rated Minimum Maximum A
20 – 26 54.1 120 110 130 0.455
Chromaticity coordinates: see B-2.
"Colour" Tc x y

F 6500 6 400 0.313 0.337

F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380
F 3500 3 450 0.409 0.394
F 3000 2 940 0.440 0.403
F 2700 2 720 0.463 0.420

The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C.

Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.480 8 6 10
Reference Ballast Characteristics
Frequency Nominal Rated Voltage Calibration Resistance
Wattage Current

kHz W V A
20 - 26 54 235 0.460 255

2418-IS-6840

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 IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz kHz  20
Current in any lead to cathodes Maximum 0.650
Lamp operating current Minimum 0.370
Maximum 0.625

Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Qmin (J) 2.2
Minimum cathode preheat energy : Emin = Qmin + Pmin ts J
Pmin (W) 1.0
Voltage across each cathode for E(t) < Emin V Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements  4.8
Qmax (J) 3.8
Maximum cathode preheat energy : Emax = Qmax + Pmax ts J
Pmax (W) 1.8
Substitution resistor for each cathode. for testing maximum cathode preheat requirements  6.5
Non-ignition voltage t ? ts Maximum (r.m.s.) 240
Open circuit voltage across lamp V t > ts (+10 °C) Minimum (r.m.s.) 520
Ignition voltage
t > ts (-15 °C) Minimum (r.m.s.) 620
Non-ignition voltage t ? ts Maximum (peak) *
Voltage to starting aid V
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  4.8 - 14.4

Starting Requirements Without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *

Typical Characteristics for a Lamp at 35°C Ambient Temperature

Lamp Wattage Lamp Voltage Lamp Current
W V A
53.8 118 0.460
* Under consideration.

2418-IS-6840

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IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 4 100
4000 K 4 450
2700 K 4 450
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

64
 IS 2418 (Part 2) : 2018

DOUBLE-CAPPED FLUORESCENT LAMP DATA SHEET

Nominal Wattage Circuit Cathode Cap Nominal Dimensions

W mm
80 HF starterless Preheated G5 16 × 1 450

Dimensions, mm
A B C D
Maximum Minimum Maximum Maximum Maximum
1 449.0 1 453.7 1 456.1 1 463.2 17.0
Starting Characteristics
Frequency Starting Aid Preheat Current Preheat Time Open Circuit Starting time
Distance Voltage
(r.m.s.)
kHz mm A s V s
20 – 26 6 0.765 2 580 0.1

Electrical Characteristics
Frequency Rated Wattage Voltage (r.m.s.) at Lamp Terminals Rated Lamp Current

V
kHz W Rated Minimum Maximum A
20 – 26 79.8 152 137 167 0.530

Chromaticity coordinates: see B-2.

"Colour" Tc x y

F 6500 6 400 0.313 0.337

F 5000 5 000 0.346 0.359
F 4000 4 040 0.380 0.380
F 3500 3 450 0.409 0.394
F 3000 2 940 0.440 0.403
F 2700 2 720 0.463 0.420

The maximum luminous flux shall be obtained at an ambient temperature between 34 ° C and 38 °C

Cathode Characteristics
Test Current Resistance of Each Cathode
Rated Minimum Maximum
0.525 7.0 5.25 8.75

Reference Ballast Characteristics

Frequency Nominal Rated Voltage Calibration Resistance
Wattage Current

kHz W V A
20 - 26 80 290 0.552 260

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IS 2418 (Part 2) : 2018

Information for High Frequency Ballast Design

Frequency kHz kHz  20
Current in any lead to cathodes A Maximum 0.715
Lamp operating current A Minimum 0.440
Maximum 0.670
Starting Requirements with Cathode Preheating, for Starting Times 0.4 s < ts < 3.0 s
Minimum cathode preheat energy : Emin = Qmin + Pmin ts J Qmin (J) 2.2
Pmin (W) 1.0
Voltage across each cathode for E(t) < Emin V Maximum (r.m.s.) 11
Substitution resistor for each cathode. for testing minimum cathode preheat requirements  4.5
Maximum cathode preheat energy : Emax = Qmax + Pmax ts J Qmax (J) 4.2
Pmax (W) 1.9
Substitution resistor for each cathode. for testing maximum cathode preheat requirements  6.0
Non-ignition voltage t  ts Maximum (r.m.s.) 250
Open circuit voltage across lamp V t > ts (+10 °C) Minimum (r.m.s.) 580
Ignition voltage
t > ts (–15 °C) Minimum (r.m.s.) 750
Non-ignition voltage t  ts Maximum (peak) *
Voltage to starting aid V
Ignition voltage t > ts Minimum (peak) *
Substitution resistor range for each cathode. for testing open circuit voltage requirements  4.5 - 13.5
Starting Requirements without Cathode Preheating, for Starting Times ts < 0.1 s
Open circuit voltage across lamp V Minimum (r.m.s.) *
Current through lamp substitution resistor A Minimum *
Lamp substitution resistor  *
Substitution resistor for each cathode  *
Cathode current A Maximum *
Typical Characteristics for a Lamp at 35°C Ambient Temperature
Lamp Wattage Lamp Voltage Lamp Current

W V A
80.0 145 0.555

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 IS 2418 (Part 2) : 2018

LUMINOUS AND COLOUR CHARACTERISTICS

RATED COLOUR RATED LUMINOUS FLUX
(1) (2)
Lumens
6500 K 5 700
4000 K 6 150
2700 K 6 150
Life Test
Minimum Value: for Lumen Maintenance
At 2 000 h 90 percent
At 70 percent life 85 percent

67
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