The ultra slim T6C Series 1x4 Ft. LED Troffer is an IC-rated flat panel fixture that measures just 1.5-inches in depth (including the driver). The T6C LED Troffer provides even edge-to-edge illumination for a clean and modern look while eliminating hot spots and shadowing common in cheaper fixtures. The T6C 1x4 produces an impressive 3,400 lumens at 125 Lumens per Watt with a tested lifespan of over 100,000 hours (equivalent to 10 hours per day for 27 years). The steel constructed frame and polystyrene diffuser lens are sealed to keep out dust and other debris. Designed for installation simplicity, the T6C features smooth formed edges and built-in grid clips for a more secure installation with added safety. The T6C comes ready to install and use directly out-of-the-box, equipped with built-in 4kV surge protection, 0-10VDC dimming, and a pre-installed LED driver. Available in 1x4, 2x2, and 2x4 ft. configurations with optional accessories for surface mounting or recessed mounting applications (sold separately). The T6C is protected by NICOR 5 Year Limited Warranty.