Fluorescent Ballast, Programmed, 54 W, 277 V Ac, 0.98 A, Non Dimmable, 2 Lamps, 14.17 In Length, 1.18 In Width, 1.06 In Height, 1 Ballast Factor, 0.98 Power Factor, 50 HZ;60 HZ, Metal Housing Material, 10 % Total Harmonic Distortion, -20 °F Starting Temperature, 441 G/Ea