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White square LED light kit 11in wide 2 7/8in deep steel housing acrylic lens

Acuity Lithonia

Acuity Lithonia FMLSL 11 14840 M4 LED Square Light Kit 11in 16W 4000K

SKU CH-4RN9-48T0K

11 in square LED light kit delivers 1,100 lm at 4000 K with 80 CRI and TRIAC dimming from 16 W at 120 V

  • 1,100 lm output for bright, even illumination
  • 4000K neutral white suits kitchens and workspaces
  • TRIAC dimming works with standard wall controls
  • 16 W draw keeps energy costs low
  • 11 in square steel housing fits flush ceilings

11 in square LED light kit

The Acuity Lithonia FMLSL 11 14840 M4 is an 11 inch square LED light kit designed for interior ceiling or wall mounting. It delivers 1,100 lumens at 4000K with a CRI of 80, making it suited for kitchens, hallways or utility spaces where neutral white light is preferred. The steel housing with white finish and acrylic lens suits both residential and light commercial installations. Dimmable via TRIAC dimmers, it works with standard 120V AC wiring.

Thermals noise and power

The fixture draws a maximum of 16 watts and operates directly on 120V AC without a separate ballast. LED technology keeps surface temperatures low during continuous use, and the solid-state design produces no audible hum or fan noise. The acrylic lens diffuses light evenly while the steel housing acts as a passive heat sink, maintaining stable output over long duty cycles.

Bundled accessories and software

The kit ships as a complete, ready-to-install unit with the LED array, driver and acrylic lens integrated into the steel housing. No separate bulbs, ballasts or mounting hardware packs are listed in the specifications. TRIAC dimming compatibility means the light can be paired with many existing wall dimmers without additional modules or configuration software.

Highlights

  • 1,100 lm output for bright, even illumination
  • 4000K neutral white suits kitchens and workspaces
  • TRIAC dimming works with standard wall controls
  • 16 W draw keeps energy costs low
  • 11 in square steel housing fits flush ceilings

Specifications

BrandLITHONIA LIGHTING

Questions about this item

How is the 11 in square light kit mounted to a 120V AC junction box, and what wiring step is often missed?

Secure the steel housing to a standard junction box with the supplied screws, connect the black, white, and ground wires to the matching supply leads, and attach the acrylic lens before restoring power — skipping the ground connection is the most common error.

Which component will need replacement first, and what is its rated output?

The integrated LED array delivers 1 100 lm at 4000K and is not user-replaceable; when output degrades below useful levels the entire 16 W fixture must be replaced.

What thermal or electrical limit appears first during continuous operation?

The TRIAC dimming circuit and driver are designed for 120V AC at 16 W maximum; sustained full-power use will reach the driver’s thermal limit before any other constraint.

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