Catalog

Number

Notes

FEATURES & SPECIFICATIONS Type

INTENDED USE —The BLT Best-in-Value Low Profile LED luminaire features a popular center basket design
that offers a clean, versatile style and volumetric distribution. High efficacy LED light engines deliver energy
savings and low maintenance compared to traditional sources. An extensive selection of configurations and
options make the BLT the perfect choice for many lighting applications including schools, offices and other BLT Series LED
commercial spaces, retail, hospitals and healthcare facilities. The low profile BLT design (2-3/8") also makes

2BLT4 Tunable White

it an excellent choice for renovation projects.
BLT Tunable White is perfect in classrooms and educational settings as it allows the light color temperature
to be adjusted to the optimal light level for student tasks such as reading or test taking.
CONSTRUCTION — Prior to fabrication, BLT components are coated with a proprietary paint blend and
die-formed for dimensional consistency.
The reflector is finished with a high reflective matte white powder paint for improved aesthetics and
increased light diffusion. 2' x 4'
End plates contain easy-to-position integral T-bar clips for securely attaching the luminaire to the T-grid. LED
For additional T-grid security, optional screw on T-bar clips are available.
Diffusers are extruded from impact modified acrylic for increased durability. Injection molded diffuser light
traps add a finished look to the diffuser ends and help seal the diffuser to the housing end plates. Optional
diffuser trim rings provide an attractive mounting for integral sensors as well as adding a decorative element
to the luminaire aesthetics.
LED boards and drivers are accessible from the plenum.
OPTICS — Volumetric illumination is achieved by creating an optimal mix of light to walls, partitions
and vertical and horizontal work surfaces – rendering the interior space, objects and occupants in a more
balanced, complimentary luminous environment. High performance extruded acrylic diffusers conceal LEDs
and efficiently deliver light in a volumetric distribution. Four diffuser choices available - curved and square
designs with linear prisms or a smooth frosted finish.
ELECTRICAL — Long-life LEDs, coupled with high-efficiency drivers, provide superior quantity and quality
of illumination for extended service life. 80% LED lumen maintenance at 60,000 hours (L80/60,000).
eldoLED driver options deliver choice of dimming range, and choices for control, while assuring flicker-free,
low-current inrush, 89% efficiency and low EMI. Tunable White GPHD
• Gamut: One dimensional Warm-Cool
Integrated nLight®controls make each luminaire addressable — allowing it to digitally communicate with • Path: Direct 3000K to 5000K (Productivity Range) or 2700K to 6500K (Rhythm Range)
other nLight enabled controls such as dimmers, switches, occupancy sensors and photocontrols. Simply
connect all the nLight enabled control devices and the BLT luminaires using standard CAT-5e cabling. Unique • Handle: Two Natural Language Handles: Intensity and CCT
plug-and-play convenience as devices and luminaires automatically discover each other and self-commission. • Data: nLight with nTune technology for both handles of control
Mainstream Dynamic Tunable White with nTune Technology: This sensor is nLight-enabled, meaning
it has the ability to communicate over an nLight network. When wired, using CAT-5e cabling, with other 580

nLight-enabled sensors, power packs, or WallPods, an nLight control zone is created. Once linked to a Gateway, A Productivity Range
2700K

directly or via a Bridge, the zone becomes capable of remote status monitoring and control via SensorView 3500K
3000K
590
software. See page 2 for the nLight sensor options. 5000K
4500K
4000K

2200K
2000K

Integrated Sensor (nLight Wired Networking): Tunable white nTune™ is an all digital light color 5700K

6500K
1800K

temperature control within an nLight enabled luminaire. This brings tunable white lighting control into the
mainstream with repeatable, consistent results in an economical luminaire form and system already familiar
10000K

to schools. Designers and facility operators are granted the freedom to tie scenes to specific activities or to B Rhythm Range
complement colors or materials within a visual environment. nTune™ allows color temperature settings
through the Productivity Range of 3000K-5000K and the Rhythm Range of 2700K to 6500K. Refer to the
Programming User’s Guide for instructions on customizing to your application with SensorView.
INSTALLATION — The BLT’s low profile design of only 2-3/8" provides increased installation flexibility
especially in restrictive plenum applications. The BLT fits into standard 15/16" and narrow 9/16" T-grid
A Productivity Range 3000K to 5000K
ceiling systems.
Suitable for damp location. B Rhythm Range 2700K to 6500K

For recessed mounting in hard ceiling applications, Drywall Grid Adapters (DGA) are available as an accessory.
See Accessories section.
LISTINGS — CSA Certified to meet U.S. and Canadian standards. IC rated.
WARRANTY — 5-year limited warranty. This is the only warranty provided and no other statements
in this specification sheet create any warranty of any kind. All other express and implied warranties Capable Luminaire
are disclaimed. Complete warranty terms located at: www.acuitybrands.com/support/warranty/ This item is an A+ capable luminaire, which has been designed and tested to
terms-and-conditions
provide consistent color appearance and out-of-the-box control compatibility with
NOTE: Actual performance may differ as a result of end-user environment and application.
All values are design or typical values, measured under laboratory conditions at 25 °C.
simple commissioning.
Specifications subject to change without notice. • All configurations of this luminaire meet the Acuity Brands’ specification for
chromatic consistency
• This luminaire is part of an A+ Certified solution for nLight® control networks
when ordered with drivers marked by a shaded background*
• This luminaire is part of an A+ Certified solution for nLight control networks,
providing advanced control functionality at the luminaire level, when selection
includes driver and control options marked by a shaded background*
To learn more about A+, visit www.acuitybrands.com/aplus.
*See ordering tree for details

COMMERCIAL INDOOR 2BLT-2X4-NTUNE

2BLT Tunable White Volumetric Recessed Lighting 2'x4'
A+ Capable options indicated
by this color background.

ORDERING INFORMATION Lead times will vary depending on options selected. Consult with your sales representative. Example: 2BLT4 TUWH PROR 40L ADP NLT

2BLT4

Series Dynamic feature Dynamic range Lumens2 Diffuser Voltage Control interface type

2BLT4 2x4 BLT TUWH Tunable PROR Productivity range 30L 3000 ADP Curved, linear prisms (blank) MVOLT NLT nLight nTune
white (3000-5000K) 40L 4000 ADSM Curved, smooth 120 120 interface4
RHYR Rhythm range 48L 4800 SDP Square, linear prisms 277 277 NLTEMG nLight nTune
(2700-6500K)1 Interface.
60L 6000 SDSM Square, smooth 347 3473 For use with
Diffusers w/ trim rings generator
supply EM
ADPT Curved, linear prisms power.
ADSMT Curved, smooth
SDPT Square, linear prisms
SDSMT Square, smooth

Occupancy control5 Options

(blank) No sensor control BDP Disconnect Plug GMF Slow-blowing fuse8

nLight Wired Networking EL7L 700 lumen battery pack (Noncompliant with CA T20) 6 NPLT Narrow pallet
NES7 nLight™ nES 7 PIR integral occupancy sensor EL14L 1400 lumen battery pack (Noncompliant with CA T20) 6 RRL_ RELOC®-ready luminaire9
NESPDT7 nLight™ nES PDT 7 dual technology integral occupancy E10WLCP EM Self-Diagnostic battery pack, 10W Constant Power, LATC Earthquake clip
control Certified in CA Title 20 MAEDBS 6 DWAM Anti-Microbial paint
NES7ADCX nLight™ nES 7 ADCX PIR integral occupancy sensor with BGTD Bodine Generator Transfer Device7
automatic dimming photocell 90CRI 90 CRI
PWS1836 6’ pre-wire, 3/8” diameter, 18 gauge, 1 circuit
NESPDT7ADCX nLight™ nES PDT 7 dual technology integral occupancy JP14 Job Packaging 10
sensor with automatic dimming photocell PWS1846 6’ pre-wire, 3/8” diameter, 18 gauge, 2 circuit
JP18 Job Packaging 11
GLR Fast-blowing fuse8

Accessories: Order as separate catalog number. nLight® Control Accessories:

Order as separate catalog number. Visit www.acuitybrands.com/products/controls/nlight.
DGA24 Drywall grid adapter for 2x4 recessed fixture
2X4SMKSHP PAF Surface Mount Troffer Kit Post Paint WallPod stations Model number Occupancy sensors Model number
RK8BDP 2P U Disconnect Plug (BDP), 2 Pole, Package of 1 On/Off nPODM Small motion 360°, ceiling (PIR / dual tech) nCM 9 RJB / nCM PDT 9 RJB
RK8BDP 3P U Disconnect Plug (BDP), 3 Pole, Package of 1 On/Off & raise/lower nPODM DX Large motion 360°, ceiling (PIR / dual tech) nCM10 RJB / nCM PDT 10 RJB
RK8BDP 2P J10 Disconnect Plug (BDP), 2 Pole, Package of 10 Wall switch with raise/lower nWSX PDT LV DX [color]
RK8BDP 2P J40 Disconnect Plug (BDP), 2 Pole, Package of 40 Photocell controls Model number Cat-5 cable (plenum rated) Model number
Full range dimming nCM ADCX RJB 10' cable CAT-5e 10FT J1
30' cable CAT-5e 30FT J1
Power Supply
nLight Power Supply nPS 80

Replacement Parts: Order as separate catalog number.

*237LKE 2DBLT48 ADP LENS ASSEMBLY 4 ft. replacement lens (light traps included)
Notes
*237LKL 2DBLT48 SDP LENS ASSEMBLY 4 ft. replacement lens (light traps included) 1 Only RHYR versions are DLC listed.
*237LL2 2DBLT48 ADSM LENS ASSEMBLY 4 ft. replacement lens (light traps included) 2 Approximate lumen output.
*237LLA 2DBLT48 SDSM LENS ASSEMBLY 4 ft. replacement lens (light traps included) 3 Not available with EL7L, EL14L, or E10WLCP battery packs.
4 Requires power from nLight network bridge or nPS 80.
*237LT2 2DBLT48 ADPT LENS ASSEMBLY 4 ft. replacement lens (trims included)
5 Must specify diffuser with trims rings. See sensor options in ordering information.
*237LT4 2DBLT48 SDPT LENS ASSEMBLY 4 ft. replacement lens (trims included) 6 When using pre-wire option, use PWS1846.
*237LT6 2DBLT48 ADSMT LENS ASSEMBLY 4 ft. replacement lens (trims included) 7 Must specify voltage. Requires BSE labeling. Consult factory for options.
*237LT8 2DBLT48 SDSMT LENS ASSEMBLY 4 ft. replacement lens (trims included) 8 Must specify voltage, 120 or 277 with GLR & GMF fusing.
9 For ordering logic consult: RRL_2013.
*237LTA 2DBLT48 ADPT SENSOR LENS ASSEMBLY 4 ft. replacement lens (trims included) 10 Only available with controls options: NES7, NESPDT7, NES7ADCX or NESPDT7ADCX.
*237M52 2DBLT48 SDPT SENSOR LENS ASSEMBLY 4 ft. replacement lens (trims included) 11 Not available with controls options: NES7, NESPDT7, NES7ADCX or NESPDT7ADCX.
*237M5A 2DBLT48 ADSMT SENSOR LENS ASSEMBLY 4 ft. replacement lens (trims included)
*237M5L 2DBLT48 SDSMT SENSOR LENS ASSEMBLY 4 ft. replacement lens (trims included)

2BLT-2X4-NTUNE

COMMERCIAL INDOOR: One Lithonia Way Conyers, GA 30012 Phone: 1-800-705-SERV (7378) www.lithonia.com © 2015-2023 Acuity Brands Lighting, Inc. All rights reserved. Rev. 10/09/23
2BLT Tunable White Volumetric Recessed Lighting 2'x4'

Multiple Diffuser Options

Specifications
Length: 47-3/4 (121.2) ADP ADSM
Width: 23-3/4 (60.3) Curved Ribbed Curved Smooth

Depth: 2-3/8" (6)

All dimensions are inches (centimeters) unless otherwise specified.

SDP SDSM
Square Ribbed Square Smooth

Tunable White Wall Pods

nPODM 2P DX CCT nPODM 4S DX EDUTW nPODM 4S EDUTW

Typical nLight network layout with power supply, sensor and wallpod.

nPODM 2P DX CCT

A
nCM PDT 9
J-BOX

nPS 80

B
A A

nCM ADCX
WIRING KEY
A B
CAT-5e Cable Line Power

nPODM
nPS 80 nCM BLT

40mA
40mA ~5mA ~3mA ~3mA
~6mA w/ Sensor

2BLT-2X4-NTUNE

COMMERCIAL INDOOR: One Lithonia Way Conyers, GA 30012 Phone: 1-800-705-SERV (7378) www.lithonia.com © 2015-2023 Acuity Brands Lighting, Inc. All rights reserved. Rev. 10/09/23
2BLT Tunable White Volumetric Recessed Lighting 2'x4'

Sensor Options
Automatic Occupancy Sensing nLight Wired
Option
Dimming Photocell PIR PDT Networking
NES7 X X
NES7ADCX X X X
NESPDT7 X X
NESPDT7ADCX X X X
* Requires network to be present for sensors to operate

nLight Wired Networking

The nES 7 is ideal for small rooms without obstructions or areas with primarily walking
motion. Ideal areas include hallways, corridors, storage rooms, and breakrooms.
Additionally, the NES7ADCX includes an integrated photocell, which enables daylight
harvesting controls.
For areas like restrooms, private offices, open offices, conference rooms or any space
with obstructions, the nES PDT 7 dual technology sensor is recommended. The nES PDT 7
utilizes both PIR (passive infrared) and Microphonics technologies to detect occupancy.
Additionally, the NESPDT7ADCX includes an integrated photocell, which enables daylight
harvesting controls which is ideal for areas where windows are present.

Sequence of
SEQUENCE OFOperation
OPERATION
MOTION NO MOTION MOTION
MAX

Occupants Room Sensor

Detected In Unoccupied Detects
LIGHT LEVEL

The Space Motion

MIN
LIGHTS ON 7.5 MIN 2.5 MIN AT LIGHTS OFF LIGHTS ON
TIME DELAY A 1% LEVEL

*The presetting on the automatic dimming photocell is 5fc.

Sensor Coverage Pattern 9 FT Mounting

Mini 360° Lens
• Recommended for walking motion detection from mounting heights between 8 ft (2.44 m) and 20 ft (6.10 m) 5.5 18
4.6 15
• Initial detection of walking motion along sensor axes at distances of 2x the mounting height up to 15 ft (4.57 m) and 3.7 12
• 1.75x up to 20 ft (6.10 m). 2.7 9
• Provides 12 ft (3.66 m) radial detection of small motion when mounted at 9 ft (2.74 m) 1.8 6
0.9 3
• Initial detection will occur earlier when walking across sensor’s field of view than when walking directly at sensor 0m 0 ft
0.9 3
1.8 6
2.7 9
3.7 12
4.6 15
5.5 18

2BLT-2X4-NTUNE

COMMERCIAL INDOOR: One Lithonia Way Conyers, GA 30012 Phone: 1-800-705-SERV (7378) www.lithonia.com © 2015-2023 Acuity Brands Lighting, Inc. All rights reserved. Rev. 10/09/23
2BLT Tunable White Volumetric Recessed Lighting 2'x4'
PHOTOMETRICS
2BLT4 TUWH RHYR 40L ADP @2700K, 82CRI,
180°
Coefficients of Utilization
pf 20%
90°
CP Summary pc 80% 70% 50% Zonal Lumen Summary
80° 0° 90 pw 70%50%30% 50%30%10% 50%30%10% Zone Lumens % Lamp % Fixture
200 0° 1310 1310 0 119 119 119 116 116 116 111 111 111 0° - 30° 1013 25.6 25.6
5° 1294 1310 1 108 102 97 100 96 92 96 92 89 0° - 40° 1650 41.7 41.7
400 15° 1236 1263 2 97 88 81 86 80 74 83 77 72 0° - 60° 2927 74.0 74.0
60°
25° 1123 1173 3 88 77 69 76 68 61 72 66 60 0° - 90° 3953 100.0 100.0
600
35° 970 1046 4 81 68 59 67 58 52 64 57 51 90° - 120° 2 0.0 0.0

RCR
800 45° 788 898 5 74 61 51 60 51 44 57 50 44 90° - 130° 2 0.0 0.0
55° 594 752 6 68 55 45 54 45 39 52 44 38 90° - 150° 2 0.0 0.0
1000 65° 403 614 7 63 50 40 49 40 34 47 39 34 90° - 180° 2 0.0 0.0
40° 75° 210 455 8 59 45 36 44 36 30 43 36 30 0° - 180° 3955 100.0 100.0
1200 85° 47 195 9 55 41 33 41 33 27 40 32 27
0° 20° 90 1 17 10 52 38 30 38 30 25 37 30 25
0° 90°

2BLT4 TUWH RHYR 40L ADP @4500K, 82CRI,

180°
Coefficients of Utilization
pf 20%
90°
CP Summary pc 80% 70% 50% Zonal Lumen Summary
80° 0° 90 pw 70%50%30% 50%30%10% 50%30%10% Zone Lumens % Lamp % Fixture
200 0° 1185 1185 0 119 119 119 116 116 116 111 111 111 0° - 30° 917 25.6 25.6
5° 1171 1186 1 108 102 97 100 96 92 96 92 89 0° - 40° 1494 41.7 41.7
400 15° 1119 1144 2 97 88 81 86 80 74 83 77 72 0° - 60° 2649 74.0 74.0
60°
25° 1017 1062 3 88 77 69 76 68 61 72 66 60 0° - 90° 3578 100.0 100.0
600 35° 878 947 4 81 68 59 67 58 52 64 57 51 90° - 120° 2 0.0 0.0
RCR

45° 713 813 5 74 61 51 60 51 44 57 50 44 90° - 130° 2 0.0 0.0

800 55° 537 681 6 68 55 45 54 45 39 52 44 38 90° - 150° 2 0.0 0.0
65° 365 555 7 63 50 40 49 40 34 47 39 34 90° - 180° 2 0.0 0.0
1000 40° 75° 190 412 8 59 45 36 44 36 30 43 36 30 0° - 180° 3580 100.0 100.0
85° 43 176 9 55 41 33 41 33 27 40 32 27
12000° 20° 90 1 15 10 52 38 30 38 30 25 37 30 25
0° 90°

2BLT4 TUWH RHYR 40L ADP @6500K, 82CRI,

180°
Coefficients of Utilization
pf 20%
90°
CP Summary pc 80% 70% 50% Zonal Lumen Summary
80° 0° 90 pw 70%50%30% 50%30%10% 50%30%10% Zone Lumens % Lamp % Fixture
200 0° 1275 1275 0 119 119 119 116 116 116 111 111 111 0° - 30° 986 25.6 25.6
5° 1259 1275 1 108 102 97 100 96 92 96 92 89 0° - 40° 1606 41.7 41.7
400 15° 1203 1230 2 97 88 81 86 80 74 83 77 72 0° - 60° 2848 74.0 74.0
60°
25° 1093 1142 3 88 77 69 76 68 61 72 66 60 0° - 90° 3847 100.0 100.0
600 4 81 68 59 67 58 52 64 57 51 90° - 120° 2 0.0 0.0
35° 944 1018
RCR

45° 767 874 5 74 61 51 60 51 44 57 50 44 90° - 130° 2 0.0 0.0

800
55° 578 732 6 68 55 45 54 45 39 52 44 38 90° - 150° 2 0.0 0.0
1000 65° 392 597 7 63 50 40 49 40 34 47 39 34 90° - 180° 2 0.0 0.0
40° 75° 204 443 8 59 45 36 44 36 30 43 36 30 0° - 180° 3849 100.0 100.0
1200 85° 46 190 9 55 41 33 41 33 27 40 32 27
0° 20° 90 1 16 10 52 38 30 38 30 25 37 30 25
0° 90°

2BLT-2X4-NTUNE

COMMERCIAL INDOOR: One Lithonia Way Conyers, GA 30012 Phone: 1-800-705-SERV (7378) www.lithonia.com © 2015-2023 Acuity Brands Lighting, Inc. All rights reserved. Rev. 10/09/23
2BLT Tunable White Volumetric Recessed Lighting 2'x4'
LUMEN OUTPUT
Fixture Lumen [RHYR] LUMEN OUTPUT PER SCALING PROCEDURE, PER CCT
size package 2700K 3000K 3500K 4000K 4500K 5000K 5700K 6500K
2000 1985 1914 1821 1759 1709 1728 1779 1913
3000 2998 2893 2755 2664 2694 2618 2695 2893
2BLT4 4000 3955 3835 3678 3574 3580 3525 3617 3849
4800 4671 4561 4417 4322 4144 4280 4370 4592
6000 5667 5627 5576 5546 5618 5544 5591 5693
DLC information is subject to change, for the most up-to-date information please refer to www.designlights.org. Above listings do not cover 347v.

POWER OUTPUT
Fixture Lumen [RHYR] POWER OUTPUT PER SCALING PROCEDURE, PER CCT
size package 2700K 3000K 3500K 4000K 4500K 5000K 5700K 6500K
2000 16.50 15.77 14.77 14.04 13.58 13.40 13.61 14.50
3000 24.40 23.20 21.57 20.41 19.72 19.50 19.99 21.68
2BLT4 4000 32.89 31.21 28.95 27.35 26.43 26.17 26.94 29.42
4800 39.90 37.87 35.13 33.20 32.09 31.78 32.71 35.72
6000 50.74 48.15 44.67 42.22 40.80 40.42 41.63 45.49
DLC information is subject to change, for the most up-to-date information please refer to www.designlights.org. Above listings do not cover 347v.

LUMENS PER WATT (LPW)

Fixture Lumen [RHYR] LPW OUTPUT PER SCALING PROCEDURE, PER CCT
size package 2700K 3000K 3500K 4000K 4500K 5000K 5700K 6500K
2000 120 121 123 125 126 129 131 132
3000 123 125 128 131 137 134 135 133
2BLT4 4000 120 123 127 131 135 135 134 131
4800 117 120 126 130 129 135 134 129
6000 112 117 125 131 138 137 134 125
DLC information is subject to change, for the most up-to-date information please refer to www.designlights.org. Above listings do not cover 347v.

MOUNTING DATA 9/16 15/16 Screw Slot

Ceiling Type Appropriate

Trim Type
Exposed grid tee
(1’ and 9/16”) G
*DGA accessory available to provide ceiling trim flange and fixture support for plaster
Concealed grid tee G or plasterboard ceiling. Recommended rough-in dimensions for DGA installation is
24-3/4" x 48-3/4" (Tolerance is +1/8", -0”).
Plaster or plasterboard G*

How to Calculate Delivered Lumens in Emergency Mode

Use the formula below to determine the delivered lumens in emergency mode
Delivered Lumens = 1.25 x P x LPW
P = Ouput power of emergency driver. P = 10W for E10WLCP option.
LPW = Lumen per watt rating of the luminaire. This information is available on the ABL luminaire spec sheet.
LPW = Lumen per watt rating of the luminaire. LPW information available in Performance Data section.

2BLT-2X4-NTUNE

COMMERCIAL INDOOR: One Lithonia Way Conyers, GA 30012 Phone: 1-800-705-SERV (7378) www.lithonia.com © 2015-2023 Acuity Brands Lighting, Inc. All rights reserved. Rev. 10/09/23