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White rectangular 4 ft LED troffer with center basket lens

LITHONIA LIGHTING

LITHONIA LIGHTING BLT4 40L ADP LP840 4 ft 4179 lm 33W light kit

SKU CH-GMQ0-A233F

4 ft recessed troffer delivers 4,179 lumens at 126.2 lm/W from a 33 W integrated LED with 4000 K colour temperature and 82 CRI

  • weight11.4
  • 4179 lumens brighten large spaces
  • 33 watts deliver 126.2 lm/W efficiency
  • 4000K CCT with 82 CRI for accurate colour
  • DLC 5.0 Premium certified for utility rebates
  • Dimmable 120–277V driver fits standard circuits

4 ft recessed LED troffer

The LITHONIA LIGHTING BLT4 40L ADP LP840 is a 4 ft recessed troffer kit delivering 4179 lm at 4000K. It operates on 120 to 277V AC and draws 33 W for an efficacy of 126.2 lm/W. The integrated LED array replaces two T8 lamps and carries a CRI of 82.

Steady output with dimming control

The driver maintains consistent output across the 120 to 277V range and supports dimming for load management. With no ballast required the fixture runs cooler during extended operation. DLC 5.0 Premium listing confirms sustained performance metrics.

Lightweight centre basket mounting

At 11.4 the unit is light enough for standard grid ceilings without reinforcement. The centre basket lens shape simplifies cleaning and relamping access. No emergency battery backup or sensor is included so wiring remains straightforward.

Highlights

  • 4179 lumens brighten large spaces
  • 33 watts deliver 126.2 lm/W efficiency
  • 4000K CCT with 82 CRI for accurate colour
  • DLC 5.0 Premium certified for utility rebates
  • Dimmable 120–277V driver fits standard circuits

Specifications

BrandLITHONIA LIGHTING
weight11.4

Questions about this item

How much power does the 33 W BLT4 troffer draw and how much heat does it add when run continuously?

The fixture is rated at 33 W and delivers 4179 lm at 126.2 lm/W, so nearly all input power becomes light rather than heat during all-day operation.

What voltage supply and dimming interface must already be in place for the integrated LED kit to work?

It operates on 120 to 277 V AC and is dimmable; no ballast is required because the driver is built into the fixture.

Will the 4000 K, 82 CRI output match the colour quality of the older T8 lamps this 4 ft kit replaces?

It replaces two T8 lamps with a 4000 K, 82 CRI LED source, providing similar neutral-white tone and colour rendering for mixed installations.

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