Lithonia 2BLT Series 2'x4' Volumetric Recessed LED Luminaire

Features & Specifications ⚙️

? Notes: Actual performance may differ based on end-user environment and application. All values are design or typical values, measured under laboratory conditions at 25°C. Specifications are subject to change without notice.

Dimensions ?

• Length: 47-3/4" (121.2 cm)
• Width: 23-3/4" (60.3 cm)
• Depth: 2-3/8" (6.0 cm)
• Static Depth with Air supply/return: 2-3/4" (6.9 cm)

All dimensions are in inches (centimeters) unless otherwise specified.

Acuity A+ Capable Luminaire

This luminaire is designed and tested to provide consistent color appearance and out-of-the-box control compatibility with Acuity Brands control products. All configurations are calibrated to meet Acuity Brands' specifications for chromatic consistency, including color rendering, color fidelity, and color temperature tolerance. Learn more about Acuity A+ standards at www.acuitybrands.com/aplus.

Ordering Information ?

Lead times vary by options selected. Consult your sales representative. Design Select options, indicated by a shaded background, ship in 15 days or less. Visit www.acuitybrands.com/designselect for details.

Fixture Style

• (blank): Smooth Reflector
• RB: Ribbed Reflector

Air Function

• (blank): Static
• A: Air supply/return

Lumens

Standard efficiency (>100 LPW): 30L (3000), 40L (4000), 48L (4800), 60L (6000), 72L (7200), 85L (8500), 100L (10000), 120L (12000)

High efficiency (>130 LPW): 30LHE (3000), 40LHE (4000), 48LHE (4800), 60LHE (6000), 72LHE (7200), 85LHE (8500)

Diffuser

• ADP: Curved, ribbed
• ADSM: Curved, smooth
• SDP: Square, ribbed
• SDSM: Square, smooth
• LUGR: Low UGR lens (Includes trim rings to match sensored version)
• ADPT: Curved, ribbed (with trim)
• ADSMT: Curved, smooth (with trim)
• SDPT: Square, ribbed (with trim)
• SDSMT: Square, smooth (with trim)
• LUGRT: Low UGR lens (with trim)

Voltage

• (blank): MVOLT (120-277V)
• 120: 120V
• 277: 277V
• 347: 347V

Driver

• EZ1: eldoLED dims to 1% (0-10 volt dimming)
• GZ1: Dims to 1% (0-10V dimming)
• GZ10: Dims to 10% (0-10V dimming)
• SLD: Step-level dimming

Color Temperature

• LP830: 82CRI, 3000 K
• LP835: 82CRI, 3500 K
• LP840: 82CRI, 4000 K
• LP850: 82CRI, 5000 K
• LP930: 90CRI, 3000K
• LP935: 90CRI, 3500K
• LP940: 90CRI, 4000K
• LP950: 90CRI, 5000K

nLight Interface

• Wired:
• (blank): No nLight interface
• N80: nLight with 80% lumen management
• N80EMG: nLight with 80% lumen management (for generator supply EM power)
• N100: nLight without lumen management
• N100EMG: nLight without lumen management (for generator supply EM power)
• Wireless:
• (blank): No nLight AIR interface
• NLTAIR2: nLight AIR Generation 2 enabled

Control (nLight Wired)

• (blank): No sensor control
• NES7: nLight™ nES 7 PIR integral occupancy sensor
• NESPDT7: nLight™ nES PDT 7 dual technology integral occupancy control
• NES7ADCX: nLight™ nES 7 ADCX PIR integral occupancy sensor with automatic dimming photocell
• NESPDT7ADCX: nLight™ nES PDT 7 dual technology integral occupancy sensor with automatic dimming photocell

Control (nLight Wireless)

• RES7: nLight AIR control with PIR integral occupancy sensor
• RES7PDT: nLight AIR control with PDT dual technology integral occupancy sensor
• RIO: nLight AIR radio module without sensor
• RES7EM: nLight AIR PIR integral occupancy sensor with automatic dimming photocell and UL924 Emergency Operation, via power interrupt detection
• RES7PDTEM: nLight AIR PDT dual technology integral occupancy sensor with automatic dimming photocell and UL924 Emergency Operation, via power interrupt detection
• RIOEM: nLight AIR radio module less sensor, with UL924 Emergency Operation, via power interrupt detection

Individual Control

• MSD7ADCX: PIR integral occupancy sensor with automatic dimming control photocell
• MSDPDT7ADCX: PDT integral occupancy sensor with automatic dimming control photocell
• SSAIR: Wireless standalone embedded control by SensorSwitch
• SSAIR VAPIR: Wireless standalone embedded control by SensorSwitch with Passive Infrared Occ sensor with autodimming photocell

Standby Mode

• NOC: No Occupancy sensor disabled

Options

• BDP: Disconnect Plug
• EL7L: 700 lumen battery pack (Noncompliant with CA T20)
• EL14L: 1400 lumen battery pack (Noncompliant with CA T20)
• E10WLCP: EM Self-Diagnostic battery pack, 10W Constant Power, Certified in CA Title 20
• E10WSTAR: Emergency battery pack, Enabled with STAR
• CP: Chicago plenum
• BGTD: Bodine Generator Transfer Device
• PWS1836: 6' pre-wire, 3/8" diameter, 18 gauge, 1 circuit
• PWS1846: 6' pre-wire, 3/8" diameter, 18 gauge, 2 circuit
• PWS1846 PWSLV: Two cables: one 6' pre-wire, 3/8" diameter, 18 gauge, 2 circuits; one 6' pre-wire, 3/8" diameter, 18 gauge
• PWS1856LV: 6' pre-wire, 3/8" diameter, 18 gauge, 1 circuit w/ low voltage wires
• GLR: Fast-blowing fuse
• GMF: Slow-blowing fuse
• NPLT: Narrow pallet
• RRL_: RELOC®-ready luminaire
• LATC: Earthquake clip
• WH: Glossy White
• DWAM: Anti-Microbial paint
• JP14: Job packaging
• JP22: Job packaging
• IP5X: Gasketed diffuser compartment to meet IP5X rating
• BAA: Buy America(n) Act and/or Build America Buy America Qualified

Note: Options marked with ' ' have ordering restrictions. Refer to the Option Value Ordering Restrictions chart.

Option Value Ordering Restrictions

Multiple Diffuser Options

• ADP: Curved Ribbed
• ADSM: Curved Smooth
• SDP: Square Ribbed
• SDSM: Square Smooth
• LUGR: Low UGR

Non-Configurable BLT

Stock items are available for quick deployment.

*Generic 0-10V Dimming to 10%.

Mounting Data

*DGA accessory available to provide ceiling trim flange and fixture support for plaster or plasterboard ceiling. Recommended rough-in dimensions for DGA installation is 24-3/4" x 24-3/4" (Tolerance is +1/8", -0").

UL924 Sequence of Operation (nLight AIR EM)

The following applies to all nLight AIR devices with an EM option:

• EM devices remain at their high-end trim and ignore wireless lighting control commands, unless a normal-power-sensed (NPS) broadcast is received at least every 8 seconds.
• Using the CLAIRITY+ mobile app, EM devices must be associated with a group that includes a normal power sensing device to receive NPS broadcasts.
• Only non-emergency rPP20, rLSXR, rSBOR, rSDGR, and nLight AIR luminaires with version 3.4 or later firmware can provide normal power sensing for EM devices. Consult specification sheets for control devices and luminaires for more information on options that support normal power sensing.

Accessories & Replacement Parts ➕?

Accessories

• DGA24: Drywall grid adapter for 2x4 recessed fixture
• 2X4SMKSHP: Surface Mount Troffer Kit
• PAF: Post Paint
• RK8BDP 2P U: Disconnect Plug (BDP), 2 Pole, Package of 1
• RK8BDP 3P U: Disconnect Plug (BDP), 3 Pole, Package of 1
• RK8BDP 2P J10: Disconnect Plug (BDP), 2 Pole, Package of 10
• RK8BDP 2P J40: Disconnect Plug (BDP), 2 Pole, Package of 40

Replacement Parts

• 2DBLT48 ADP LENS ASSEMBLY
• 2DBLT48 SDP LENS ASSEMBLY
• 2DBLT48 ADSM LENS ASSEMBLY
• 2DBLT48 SDSM LENS ASSEMBLY
• 2DBLT48 ADPT LENS ASSEMBLY
• 2DBLT48 SDPT LENS ASSEMBLY
• 2DBLT48 ADSMT LENS ASSEMBLY
• 2DBLT48 SDSMT LENS ASSEMBLY
• 2DBLT48 ADPT SENSOR LENS ASSEMBLY
• 2DBLT48 SDPT SENSOR LENS ASSEMBLY
• 2DBLT48 ADSMT SENSOR LENS ASSEMBLY
• 2DBLT48 SDSMT SENSOR LENS ASSEMBLY

Emergency Battery Pack Options ?

Field installable battery packs.

All listed are UL Listed products certified for field install external/remote to the fixture. *Minimum delivered lumen output to assist in product selection for increased fixture mounting height. The CP10 delivered emergency illumination outperforms legacy 1400 lumen fluorescent emergency ballast. Contact techsupport@iotaengineering.com for Emergency Battery related questions.

BSE Labeling Options

BSE10: Drivers load transfer relay installed per manufacturer's instructions. Voltage, BGTD and BSE10 called out. BSE14: One voltage fixture with driver load control relay supplied with one prewire (PWS option). Prewire wired for normal circuit, the control relay for emergency circuit left unconnected. Voltage, BGTD, BSE14 and prewire called out in the description. *For configurations with Reloc or two voltages an RFA modification is required.

Emergency Lighting with STAR ?

Emergency Lighting with Self-Testing Automated Reporting (STAR) enables self-testing and automated reporting to aid in life safety code compliance. Solutions include Mobile STAR (test data logged in unit and broadcast to CLAIRITY+ app) or Connected STAR (test data logged in STAR Gateway by IOTA® and emailed directly). Eliminate ladders, disruptions, and written records with STAR-enabled emergency lighting.

Life Safety Code Requirements (NFPA 101)

• Testing for 30 seconds every 30 days
• Testing for 90 minutes once a year
• Record keeping and reporting to the authority having local jurisdiction

Performance Data ?

Unified Glare Rating (UGR)

UGR values for BLT 2x4 @ 80CRI and 3500K. UGR (70% 50% 20% reflectance using a 4H x 8H room size). UGR varies based on luminaire options and application parameters. Values depicted are considered "Luminaire-UGR and/or" Point-UGR" values. For a more precise maximum UGR value ("Application-UGR"), a full lighting design layout should be completed.

Performance Data (Standard Efficiency)

DLC information is subject to change; refer to www.dlc.org for the most up-to-date information. Above listings do not cover 347V or SLD options.

HE Performance Data (High Efficiency)

DLC information is subject to change; refer to www.dlc.org for the most up-to-date information. Above listings do not cover 347V or SLD options.

How to Estimate Delivered Lumens in Emergency Mode

Use the formula below: Delivered Lumens = 1.25 x P x LPW, where P = Output power of the emergency driver (e.g., 10W for E10WLCP option), and LPW = Lumen per watt rating of the luminaire (available in the Performance Data section).

Constant Lumen Management ?

The embedded nLight control enables the BLT to actively track its run-time and manage its light source to maintain constant lumen output over the system life. This feature, known as lumen management, eliminates energy waste from over-lighting.

Without Lumen Management: Energy is wasted, and light levels are inconsistent over time. The graph shows power input remaining constant while light output decreases.

With Lumen Management: Energy is saved, and light levels remain consistent over time. The graph shows power input adjusting to maintain constant light output.

(Description of the graph: A visual representation comparing two lines over time. One line shows constant power input and decreasing light output (wasted energy). The other line shows adjusted power input to maintain constant light output, indicating saved energy.)

Controls Overview

SensorSwitch™ Standalone Controls

SensorSwitch™ offers standalone wired and wireless lighting controls solutions designed for room-based applications, providing reliable performance and ease of installation. Visit Sensorswitch.com.

Wired Embedded Controls

Installation steps: 1. Install luminaires with embedded controls. 2. Install and wire the wall switch to power. 3. Connect load and 0-10 dimming wires from the wall switch to the luminaires. Example: SensorSwitch WSXA D.

Wireless Embedded Controls

Installation steps: 1. Install luminaires with embedded controls. 2. Insert the pairing tool into the pinhole on the wall switch; press and hold any button for 6 seconds. 3. Once paired, each fixture will individually dim to 10% brightness. All products will be fully functional. Example: SensorSwitch WSXA JOT.

nLight® Networked Controls

nLight® is a networked lighting controls platform for indoor and outdoor applications, offering wired or wireless options. It scales from room to campus-wide applications, addressing energy cost optimization, code compliance, and occupant comfort. nLight also interfaces with DALI®, BACnet®, DMX, and other third-party devices. Visit nLIGHTcontrols.com.

Wired Embedded Controls

Installation steps: 1. Install luminaires with embedded controls. 2. Install the nLight Wired wall switch. 3. Connect luminaires using standard CAT-5e cables; controls devices automatically discover each other and work (plug and play). Example: nLight nPODMA DX.

Wireless Embedded Controls

Installation steps: 1. Install luminaires with embedded controls. 2. Install the nLight AIR battery-powered wall switch. 3. Use CLAIRITY+ mobile app to pair the fixture with the wall switch and customize sensor settings as desired. Example: nLight nPODBA 2P DX Mobile Device.

Sensor Options

Sensor Descriptions

Embedded Controls by SensorSwitch:

• The MSD7ADCX PIR occupancy sensor/automatic dimming photocell is ideal for areas without obstructions where daylight harvesting is desired (e.g., hallways, corridors, storage rooms, breakrooms).
• The MSDPDT7ADCX PIR/Microphonics Dual Tech occupancy sensor/automatic dimming photocell is ideal for areas with obstructions and daylight harvesting needs (e.g., open offices, private offices, classrooms, restrooms, conference rooms).

Sequence of Operation (PIR/PDT Sensor)

(Description of the flowchart: When motion is detected, lights turn ON. After a time delay (e.g., 17.5 min), if no motion is detected, lights dim to 1% for 2.5 min, then turn OFF. If room is unoccupied, lights remain OFF.)

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

Sensor Coverage Pattern

Mini 360° Lens: Recommended for walking motion detection from 8 ft (2.44 m) to 20 ft (6.10 m) mounting heights. Provides initial detection of walking motion along sensor axes at distances up to 2x mounting height (max 15 ft / 4.57 m) or 1.75x (max 20 ft / 6.10 m). Offers 12 ft (3.66 m) radial detection of small motion when mounted at 9 ft (2.74 m). Initial detection occurs earlier when walking across the field of view than directly towards the sensor.

(Description of the coverage pattern diagram: A circular pattern showing detection zones radiating from a central point, with labels indicating distances in feet and meters at a 9 ft mounting height.)

Sequence of Operation (NES7 and RES7)

(Description of the flowchart: When motion is detected, lights turn ON. After a 7.5 min time delay, if no motion is detected, lights dim to 1% for 2.5 min, then turn OFF. If the room is unoccupied, lights remain OFF.)

*The presetting on the automatic dimming photocell is 5fc (NES7) and 10fc (RES7).

nLight AIR Wireless

nLight AIR is ideal for retrofit or new construction where adding wiring is labor-intensive. It's available with or without an integral sensor. Integrated rES7 or rES7PDT smart sensors are part of each luminaire in the nLight AIR network, which can be grouped to control multiple luminaires. Granular control with digital PIR occupancy detection and daylight sensing suits any application.

• The nES 7 is ideal for small rooms without obstructions or areas with primarily walking motion (hallways, corridors, storage rooms, breakrooms). The nES7ADCX includes an integrated photocell for daylight harvesting.
• For areas with obstructions (restrooms, private offices, open offices, conference rooms), the nES PDT 7 dual technology sensor is recommended. It uses both PIR and Microphonics technologies. The nESPDT7ADCX includes an integrated photocell for daylight harvesting, ideal for areas with windows.

Controls Accessories

nLight® Wired Control Accessories

Order as separate catalog numbers. Visit www.acuitybrands.com/products/controls/nlight.

• WallPod stations: On/Off, On/Off & raise/lower, Graphic touchscreen, Photocell controls, Full range dimming. (e.g., nPODTOUCH[Color])
• Occupancy sensors: Small motion 360°, ceiling (PIR / dual tech) (e.g., nPODMA [Color]), Large motion 360°, ceiling (PIR / dual tech) (e.g., nPODMA DX [Color]).
• Other: nWSX PDT LV DX [color] (Wallswitch), CAT5 10FT J1 (10' cable), CAT5 30FT J1 (30' cable).

BLT fixtures with integrated rIO devices complement small office spaces. Pair them with an rCMS occupancy sensor for wireless occupancy sensing and dimming capability. Consult Tech Support for additional configuration options.

nLight® AIR Control Accessories

Order as separate catalog numbers. Visit www.acuitybrands.com/products/controls/nlightair.

• Wall switches: On/Off single pole, On/Off two pole, On/Off & raise/lower single pole, On/Off & raise/lower two pole. (e.g., rPODBA [color] G2)
• Sensors: RCMS (nLight AIR occupancy and daylight sensor). Example: RCMS PDT 10 AR G2. Requires low voltage power from RPP20 DS 24V G2 or PS150.