Lensed Troffer, T4 Bulb Shape, 48 In Length, 24 In Width, 3-1/8 In/7.9 CM Height, 120 to 277 V, 32 W, Electronic Ballast, Instant, White, 2850 LM Brightness (Lumens), Bi-Pin Base, 4 Lamps, 1 Ballasts, Steel Housing Material, Baked White Enamel, Recessed Mount, 20.7999 LB/Ea