Lensed Troffer, U6T8 Bulb Shape, 23-3/4 In Length, 23-15/16 In Width, 3-1/4 In/83 MM Height, 120/277 V Ac, 64 W, Electronic Ballast, Instant, White, 6046 LM Brightness (Lumens), 2 Lamps, Steel Housing Material, Baked White Enamel, Recessed Mount/Ceiling Mount, 10.5 LB/Ea