GE UltraStart Electronic Ballast, T8 Fluorescent Lamp, 32 W Lamp, 58/59 W Wattage, 120 to 277 VAC, 0.48/0.21 A, 60 Hz Frequency, Programmed/Rapid Start, -20 deg F Minimum Starting, Total Harmonic Distortion: <10 %, Power Factor: >0.96/0.99, No Dimmable, 2 Lamps, Ballast Factor: 0.88, NEMA 1 Enclosure, 70 deg C, 9.5 in L x 1.7 in W x 1.18 in H Dimensions