Advance Electronic Dimming Ballast, Series: Mark 10™ Powerline, T8 Fluorescent Lamp, 32 W Lamp, 20 to 96 W Wattage, 120 VAC, 0.8 A, 60 Hz Frequency, Programmed Start, 50 deg F Minimum Starting, Total Harmonic Distortion: 10 %, Power Factor: 0.99, Yes Dimmable, 3 Lamps, Bi-Pin G5/G13 Lamp Base, Ballast Factor: 0.05 to 0.97, Metal, 9.5 in L x 1.7 in W x 1.18 in H Dimensions