Ballast, Programmed, 42 W, 277 V Ac, 0.78 A, CFTR42W/GX24Q Shape, Non Dimmable, 2 Lamps, 4.55 In Length, 3 In Width, 1.29 In Height, 0.97 Ballast Factor, 0.98 Power Factor, 50 to 60 HZ, Metal Housing Material, 10 % Total Harmonic Distortion, 5 Yr Warranty, 0.404 KG/Ea