Lithonia Lighting BLT4R: 1'x4' Volumetric Recessed LED Relight Troffer
Product Overview
The Lithonia Lighting BLT4R is designed as a high-performance LED relight solution for existing 1'x4' fluorescent troffers. It offers a seamless retrofit, bypassing old fluorescent components for reliable, long-lasting illumination and compatibility with modern networked controls. It is suitable for T-grid mounted recessed installations and is UL rated for air-handling troffer housings.
Note: Certain airborne contaminants may affect acrylic integrity. Refer to the Acrylic Environmental Compatibility table for suitable uses.
Construction
Features universal end brackets made of painted steel, designed for secure fit in most 1'x4' lensed or parabolic troffers. The unitized doorframe reflector and electrical chassis require no field assembly. The high-reflectivity matte white powder coating and diffuser trim rings provide a finished appearance and mounting points for integral controls and sensors. All electrical and mechanical components are accessible from below the ceiling plane.
Optics
Provides volumetric illumination by creating an optimal mix of light for walls, partitions, and work surfaces, resulting in a balanced luminous environment. High-performance extruded acrylic diffusers conceal LEDs and deliver light in a volumetric distribution. Available in four diffuser designs: curved and square with linear prisms, or smooth frosted finish.
Electrical
Utilizes long-life LEDs and high-efficiency drivers for superior illumination quality and extended service life. Offers >80% LED lumen maintenance at 60,000 hours (L80) and calculated L70 lumen maintenance >150,000 hours. Color variation is within a 3-step MacAdam ellipse (3SDCM).
Base BLTR (non-configurable): Generic 0-10 volt dimming driver, dims to 10%.
Configurable BLTR: Provides >135 LPW across a range of lumen outputs, CCTs, and driver options. eldoLED driver options offer choice of dimming range, control, flicker-free operation, low-current inrush, 89% efficiency, and low EMI.
Optional Field Adjustable Output (FAOE, FAO) devices allow for mechanical adjustment of high-end lumens.
Step-level dimming option allows switching to 50% power for energy code compliance while maintaining fixture appearance.
Integrated Sensors & Controls
Individual Control
SensorSwitch MSD7ADCX (PIR) or MSDPDT7ADCX (PIR/Microphonics Dual Tech): Integrated occupancy sensor and automatic dimming photocell. Powers off the luminaire when the space is unoccupied or has sufficient ambient light. (See page 4 for details).
nLight Wired Networking
nLight-enabled sensors communicate over an nLight network using CAT-5 cabling. Creates control zones when linked with other nLight devices and can be managed remotely via SensorView software when connected to a Gateway. (See page 6 for options).
nLight Air Wireless Platform
The rES7 sensor is nLight AIR enabled, communicating wirelessly. Available with automatic dimming photocell and PIR or PDT occupancy sensor. Pairs with other luminaires and wall switches via the CLAIRITY™ mobile app for simple sensor adjustment. (See page 6 for details).
Wireless Single Room Control
SensorSwitch SSAIR or SSAIR VAPIR luminaire-embedded occupancy and ambient light sensor allows the luminaire to power off when the space is unoccupied or has sufficient ambient light. (See page 4 for details).
Installation
After removing existing fluorescent components, universal end brackets are secured with TEKS™ screws. The integrated driver and light engine door assembly hinges to the brackets for plug-in wiring. The doorframe assembly closes and cam latches secure it. Suitable for damp location installations (sensor versions not available for damp locations).
Listings & Compliance
UL/cUL Listed for use in fluorescent luminaires and classified for static and air-handling troffer housings. Tested to LM80 standards.
DesignLights Consortium® (DLC) Premium and DLC qualified product. Check the DLC Qualified Products List at www.designlights.org/QPL for specific version qualifications.
Buy American Act: Standard BLTR meets TAA requirements. Products specified with the BAA option are assembled in the USA and meet Buy America(n) government procurement requirements. Refer to www.acuitybrands.com/buy-american for details.
Warranty
5-year limited warranty. This is the sole warranty provided.
Specifications
- Length: 47.8 inches (121.4 cm)
- Width: 11.9 inches (30.2 cm)
- Depth: 2.75 inches (6.9 cm)
- Weight: 10.25 lbs (26 kg)
All dimensions are in inches (centimeters) unless otherwise specified.
Ordering Information
Lead times vary by options. Consult your sales representative.
| Series | Air Function | Lumens | Diffuser | Voltage | Driver | Color Temperature |
|---|---|---|---|---|---|---|
| BLT4R 1X4 BLTR | (blank) Standard white two-piece flanged bracket | 20L 2000 30L 3000 40L 4000 48L 4800 60L 6000 | ADP Curved, linear prisms ADSM Curved, smooth SDP Square, linear prisms SDSM Square, smooth LUGR Very low UGR lens Diffusers w/ trim rings | (blank) MVOLT 120 120V 277 277V 347 347V | 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 | 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 |
| A Standard flanged bracket painted black | ADPT Curved, linear prisms ADSMT Curved, smooth SDPT Square, linear prisms SDSMT Square, smooth LUGRT Very low UGR lens with trim | |||||
| F Flangeless bracket for installation in drywall / "hard lid" ceilings |
Control Options
nLight Interface
- nLight Wireless: (blank) no nLight® interface, NLTAIR2 nLight AIR Generation 2 enabled
- nLight 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)
Control
- nLight Wireless: RES7 (PIR + photocell), RES7PDT (PDT + photocell), RIO (radio module), RES7EM (PIR + photocell + UL924 EM), RES7PDTEM (PDT + photocell + UL924 EM), RIOEM (radio module + UL924 EM)
- nLight Wired: (blank) No sensor control, NES7 (PIR), NESPDT7 (PDT), NES7ADCX (PIR + photocell), NESPDT7ADCX (PDT + photocell)
- Individual Control: MSD7ADCX (PIR + photocell), MSDPDT7ADCX (PDT + photocell)
- Standby Mode: NOC (Occupancy sensor disabled)
Options
- Field Adjustable Output: FAOE (Energy Focused), FAO (Old style)
- Disconnect Plug: BDP
- Battery Packs: EL7L (700 lumen), EL14L (1400 lumen), E10WLCP (10W Self-Diagnostic EM)
- Generator Transfer Device: BGTD
- Fusing: GLR (Fast-blowing), GMF (Slow-blowing)
- Pallet: NPLT (Narrow pallet)
- Compliance: BAA (Buy America(n) Act Compliant)
Performance Data
Data for ADP Diffuser is provided below. Lumen multipliers for other lens options are also available.
Lumen Package vs. Input Watts and LPW (ADP Diffuser)
| Lumen Package | Lumens | Input Watts | LPW |
|---|---|---|---|
| 20L ADP LP830 | 2,020 | 14.8 | 136 |
| 20L ADP LP835 | 2,048 | 14.8 | 138 |
| 20L ADP LP840 | 2,104 | 14.8 | 142 |
| 20L ADP LP850 | 2,137 | 14.8 | 144 |
| 30L ADP LP830 | 3,014 | 22.3 | 135 |
| 30L ADP LP835 | 3,055 | 22.3 | 137 |
| 30L ADP LP840 | 3,139 | 22.3 | 141 |
| 30L ADP LP850 | 3,178 | 22.3 | 143 |
| 40L ADP LP830 | 3,821 | 29.0 | 132 |
| 40L ADP LP835 | 3,874 | 29.0 | 134 |
| 40L ADP LP840 | 3,980 | 29.0 | 137 |
| 40L ADP LP850 | 4,021 | 29.0 | 139 |
| 48L ADP LP830 | 4,639 | 33.9 | 137 |
| 48L ADP LP835 | 4,704 | 33.9 | 139 |
| 48L ADP LP840 | 4,833 | 33.9 | 142 |
| 48L ADP LP850 | 4,881 | 33.9 | 144 |
| 60L ADP LP830 | 5,742 | 43.1 | 133 |
| 60L ADP LP835 | 5,822 | 43.1 | 135 |
| 60L ADP LP840 | 5,981 | 43.1 | 139 |
| 60L ADP LP850 | 6,024 | 43.1 | 140 |
Lumen Multiplier for Lens Options
| Lens | ADSM | SDP | SDSM | LUGR | ADPT | ADSMT | SDPT | SDSMT | LUGRT |
|---|---|---|---|---|---|---|---|---|---|
| Multiplier | 1.02 | 1.02 | 1.02 | 1.14 | 0.93 | 0.95 | 0.95 | 0.95 | 1.06 |
Optional Adjustable Output
FAOE Settings - Field Adjustable Output - Energy Focused
| 0-10 Voltage Dial Setting | % Lumen Output (approximate) | % Input Wattage (approximate) |
|---|---|---|
| Step 8 | 100% | 100% |
| Step 7 | 95% | 93% |
| Step 6 | 85% | 79% |
| Step 5 | 75% | 66% |
| Step 4 | 63% | 53% |
| Step 3 | 51% | 41% |
| Step 2 | 37% | 29% |
| Step 1 | 23% | 17% |
FAO Settings - Field Adjustable Output
| 0-10 Voltage Dimmer | % Lumen Output (approximate) | % Wattage (approximate) |
|---|---|---|
| Step 8 | 100% | 100% |
| Step 7 | 98% | 100% |
| Step 6 | 88% | 86% |
| Step 5 | 86% | 82% |
| Step 4 | 82% | 80% |
| Step 3 | 76% | 75% |
| Step 2 | 71% | 72% |
| Step 1 | 67% | 71% |
Simple adjustment of output via a flat head screwdriver.
Emergency Battery Pack Options
Field installable options provide emergency illumination.
| Battery Model Number | Wattage | Runtime (Minutes) | Lumen Output* @ 120 Lumens/Watt | Other |
|---|---|---|---|---|
| ILB CP07 2H A | 7W | 120 | 840 | Storm Shelter / 2 Hour Runtime |
| ILB CP10 A | 10W | 90 | 1200 | Title 20, Self Diagnostic |
| ILBLP CP10 HE SD A | 10W | 90 | 1200 | Title 20; Enabled with Self Testing, Automated Reporting (STAR) |
| ILB CP10 HE AELR A | 10W | 90 | 1200 | Title 20, Self Diagnostic |
| ILBLP CP15 HE SD A | 15W | 90 | 1800 | Title 20 |
| ILB CP20 HE A | 20W | 90 | 2400 | Title 20, Self Diagnostic |
| ILB CP20 HE SD A | 20W | 90 | 2400 | Title 20, Self Diagnostic |
*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 productsupportemergency@acuitybrands.com for emergency battery questions.
UL924 Sequence of Operation & BSE Labeling
UL924 Sequence of Operation: EM devices maintain high-end trim and ignore wireless commands unless a normal-power-sensed (NPS) broadcast is received every 8 seconds. CLAIRITY+ app is used to associate EM devices with a normal power sensing device. Specific nLight AIR luminaires support NPS.
BSE Labeling Options: BSE10 and BSE14 options relate to driver load transfer relays and prewire configurations for voltage and emergency circuits.
Enabled with STAR
Emergency Lighting with Self-Testing Automated Reporting (STAR) aids in life safety code compliance. Solutions include Mobile STAR (data logged individually, broadcast to CLAIRITY+ app) or Connected STAR (data logged via STAR Gateway by IOTA®, emailed directly). STAR simplifies compliance by eliminating manual record-keeping.
Life Safety Code NFPA 101 requirements include: Testing for 30 seconds every 30 days, testing for 90 minutes annually, and record keeping for authorities.
Application Guide
BLT4R: Typically used for lensed troffer installations. Includes white end brackets and optional white trim strips for gap closure. Fits Lithonia's Avante non-air fixture.
BLT4R A: Typically used for parabolic installations with black reveals. Features black end brackets to match the housing. Does not interfere with host housing air supply/return.
Controls Overview
SensorSwitch™
SensorSwitch offers standalone wired and wireless lighting controls for room-based applications, providing reliable performance and ease of installation. Visit Sensorswitch.com.
Wired Embedded Controls
Setup: 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.
Wireless Embedded Controls
Setup: 1. Install luminaires with embedded controls. 2. Insert pairing tool into wall switch pinhole, press and hold any button for 6 seconds. 3. Once paired, fixtures dim to 10% brightness and are fully functional.
nLight Platform
A networked lighting controls platform for indoor and outdoor spaces, offering wired or wireless options. Scales from room to campus-wide applications, addressing energy cost optimization, code compliance, and occupant comfort. Interfaces with DALI®, BACnet®, DMX, and other third-party devices. Visit nLIGHTcontrols.com.
nLight Wired Embedded Controls
Setup: 1. Install luminaires with embedded controls. 2. Install nLight Wired wall switch. 3. Connect luminaires using CAT-5e cables; devices auto-discover and operate plug-and-play.
nLight AIR Wireless Embedded Controls
Setup: 1. Install luminaires with embedded controls. 2. Install nLight AIR battery-powered wall switch. 3. Use CLAIRITY+ mobile app to pair fixtures with the wall switch and customize sensor settings.
Sensor Options
Details on sensor compatibility:
| Option | Automatic Dimming Photocell | Occupancy Sensing (PIR) | Occupancy Sensing (PDT) | nLight Wired Networking | nLight AIR Networking |
|---|---|---|---|---|---|
| MSD7ADCX | ✔️ | ✔️ | |||
| MSDPDT7ADCX | ✔️ | ✔️ | |||
| NES7 | ✔️ | ✔️ | ✔️ | ||
| NES7ADCX | ✔️ | ✔️ | ✔️ | ||
| NESPDT7 | ✔️ | ✔️ | ✔️ | ||
| NESPDT7ADCX | ✔️ | ✔️ | ✔️ | ||
| RES7 | ✔️ | ✔️ | ✔️ | ||
| RESPDT7 | ✔️ | ✔️ | ✔️ |
Sensor Descriptions
MSD7ADCX: PIR occupancy sensor/auto-dimming photocell for areas without obstructions. Ideal for hallways, corridors, storage rooms, breakrooms.
MSDPDT7ADCX: PIR/Microphonics Dual Tech sensor/auto-dimming photocell for areas with obstructions. Ideal for open offices, private offices, classrooms, restrooms, conference rooms.
nLight AIR (rES7/rES7PDT): Wireless solution for retrofit or new construction. Integrated sensors offer PIR or PDT occupancy detection and daylight sensing for granular control.
Sensor Coverage Pattern
Mini 360° Lens: Recommended for walking motion detection from 8-20 ft (2.44-6.10 m) mounting heights. Provides up to 15 ft (4.57 m) detection along sensor axes and 12 ft (3.66 m) radial detection of small motion at 9 ft (2.74 m).
Sequence of Operation
Visual representations of PIR sensor operation (motion detected, room unoccupied) and nES7/rES7 sensor operation (motion detected, room unoccupied) are available, illustrating light level changes and time delays.
Controls Accessories
Lithonia Lighting offers a range of accessories for nLight® Wired and nLight® AIR control systems, including WallPod stations, occupancy sensors, wall switches, and power supplies. Visit www.acuitybrands.com/products/controls/nlight and www.acuitybrands.com/products/controls/nlightair for details.
nLight Wired Accessories: WallPod stations (nPODMA, nPODMA DX, nPOD TOUCH), Occupancy sensors (nCM ADCX RJB, nCM 9 RJB/nCM PDT 9 RJB, nCM10 RJB/nCM PDT 10 RJB), Wall switches (nWSX PDT LV DX), and CAT-5 cables.
nLight AIR Accessories: Wall switches (rPODBA G2 series), and rCMS occupancy/daylight sensors with various power supply options (RPP20 DS 24V G2, PS 150).
Example Configuration: BLTR fixtures with integrated rIO devices can be paired with an rCMS occupancy sensor for wireless occupancy sensing and dimming.
Photometrics
Detailed photometric data, including Summary, Zonal Lumen Summary, Coefficients of Utilization, Cone of Light, Luminance, and Beam/Field Angles, is available for various configurations such as BLT4R 40L ADP LP840 and BLT4R 48L ADP LP840.
