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Calculation Lux

This document provides calculations to determine the number of lamps needed for an office area measuring 7m by 5m by 4m high. It calculates a room index of 0.93 based on the room dimensions and a reflection coefficient of 70-50-20. It then determines that 33 lamps are needed to provide an expected lux of 300 based on additional lighting factors. The summary calculations show the lighting will provide an actual lux of 337 from 16.9 hidden LED lamps, 9 spot lights, and 1 chandelier.

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jefry_suryadi
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757 views6 pages

Calculation Lux

This document provides calculations to determine the number of lamps needed for an office area measuring 7m by 5m by 4m high. It calculates a room index of 0.93 based on the room dimensions and a reflection coefficient of 70-50-20. It then determines that 33 lamps are needed to provide an expected lux of 300 based on additional lighting factors. The summary calculations show the lighting will provide an actual lux of 337 from 16.9 hidden LED lamps, 9 spot lights, and 1 chandelier.

Uploaded by

jefry_suryadi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Area: Office

Lux: 200 - 500

Expected Lux: 300 Lux

Calculation of Number of Lamps Requirements


Area
Length (L): 7 mtr
Width (W): 5 mtr
Height (H): 4 mtr

Room Index (K): 0.93

Utilisation Factor (UF): 0.57

Maintenance Factor (MF): 0.8

Power Lamp: Wat


Luminous Efficacy: Lumen/Wat
Lamp Lumen: 0 Lumen

Lamp Type: Rectangle


Lamp Size
Diameter: 100 mm
Lamp Width(a): 200 mm
Lamp Length(b): 400 mm
Lamp Size: 80.000 cm2

Lamp Lumen: 700

Space Height Ratio: 1.25


Max Space Between Lamps: 3.94 mtr
Max Space Lamps to Wall(a): 1.31 mtr
Max Space Lamps to Wall(b): 2.63 mtr

The Number of Luminaire Required (N): 33


lamp / sqm: 0.94
Wats / sqm: 0.00
N Lamp @ Width Room (a): 4.86 pcs 5
Space between Lamps(a): 1.04 mtr Ok
Space Lamps to Wall(a): 0.42 mtr Ok
N Lamp @ Length Room (b): 6.80 pcs 7
Space between Lamps(b): 1.02 mtr Ok
Space Lamps to Wall(b): 0.44 mtr Ok
Calculation of Room Lux based on Lamps Information
Room Size
Length (L): 7 mtr
Width (W): 5 mtr
Height (H): 3.5 mtr
Work Plane (e): 0.85 mtr
Lamp Hang (lp): 0 mtr
Symetrical Area: 35 sqm
Asymetrical Area: 0 sqm
Calc Area: 35 sqm
1.00 1.25
Room Index (K): 1.12 3 4
0.50 0.56
Room Reflection (C-W-F): 70-50-20
Utilisation Factor (UF): 0.53
Room Classification: Very Clean
Maintenance Factor (MF): 0.9

No Lamp Type Lumen (lm) Qty Total lm


1 Hidden Led 800 16.9 13520
2 Spot Light 700 9 6300
3 Chandelier 5000 1 5000

Total Area Lumen: 24820 lm

Lux: 337 lux


Area Lux
Office 200 500
House / Apartement 100 250
Hotel 200 400
Hospital / School 200 800
Basement / Storage / Toilet 100 200
Restaurant / Store / Toko 200 500
Buffet / Sales Area 300
Till / Wrapper Table 500
Warehouse 100 200
Work Area 150 300
General Assembly 1000 2000
Detailed Assembly 2000 4000
Fine Inspection 5000 10000
House
Terrace 60
Hall Way 100 150
Living Room 100 200
Family Room 120 150
Dinner Room 200 350
Working Room 120 250
Bedroom 120 250
Bathroom 250 400
Kitchen 250 500
Garrage 60
Hotel
Lobby / Corridor 100 150
Stair 50 100
Control Room 300 400
Facility Area 200 250
Hall 100 150
Daya Pencahayaan Maksimum menurut SNI
Area Watt/m2
Kantor / Industry 12 15
Rumah 10
Toko 20 40 160
Hotel 10 30
Sekolah 15 30
Rumah Sakit 10 30
Restaurant 225

Room Index
Room Reflection (C-W-F): 0.75 1.00 1.25 1.50 2.00 2.50 3.00 4.00 5.00
70-50-20 0.44 0.50 0.56 0.60 0.65 0.69 0.72 0.75 0.77
70-30-20 0.38 0.44 0.50 0.54 0.60 0.64 0.68 0.72 0.74
70-10-20 0.33 0.40 0.46 0.50 0.56 0.61 0.64 0.69 0.72
50-50-20 0.39 0.44 0.49 0.52 0.57 0.60 0.62 0.65 0.67
50-30-20 0.34 0.40 0.44 0.48 0.53 0.56 0.59 0.62 0.64
50-10-20 0.30 0.36 0.41 0.44 0.50 0.53 0.56 0.60 0.62
30-50-20 0.34 0.39 0.42 0.45 0.49 0.51 0.53 0.55 0.57
30-30-20 0.30 0.35 0.39 0.42 0.46 0.49 0.51 0.53 0.55
30-10-20 0.27 0.32 0.36 0.39 0.44 0.47 0.49 0.52 0.54

Room Classification MF
Very Clean 0.9
Clean 0.8
Average 0.7
Dirty 0.6

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