The 2 ft. x 4 ft. LED Lay-in Troffer from Lithonia Lighting represents the best quality general purpose LED lighting available in the industry. It is the energy-efficient, virtually maintenance-free alternative to conventional recessed fluorescent fixtures in grid ceiling commercial applications like offices, retail spaces and schools. It offers superior light output, improved visual appearance and it is fully dimmable with a 0-Volt to 10-Volt dimmer.