Advance Mark 10® Powerline Dimmable Fluorescent Ballast, Electronic Small Can, T8 Lamp, 32 W Lamp, 9 to 35 W Wattage, 277 VAC, 0.13 A, 60 Hz Frequency, Programmed/Rapid Start, Total Harmonic Distortion: 10%, Power Factor: 0.99, Yes Dimmable, 1 Lamp, Ballast Factor: 0.05 to 1, 70 deg C, Metal, 9.5 in L x 1.7 in W x 1.18 in H Dimensions