Advance OPTANIUM Electronic Fluorescent Ballast, T8 Lamp, 32 W Lamp, 25/24 W Wattage, 120 to 277 VAC, 0.09 to 0.21 A, 50/60 Hz Frequency, Instant Start, Total Harmonic Distortion: 10 %, Power Factor: 0.98, 1 Lamp, Ballast Factor: 0.76, 70 deg C, Metal, 9.5 in L x 1.3 in W x 1 in H Dimensions