Ballast, Programmed, 54 W, 347 to 480 V, 0.69 A, F54T5/Ho Shape, Non Dimmable, 4 Lamps, 16.70 In Length, 1.7 In Width, 1.18 In Height, 1 Ballast Factor, 0.98 Power Factor, 50 to 60 HZ, Metal Housing Material, 10 % Total Harmonic Distortion, 5 Yr Warranty, 1.212 KG/Ea