Advance Electromagnetic Fluorescent Ballast, Series: Standard, T5 Lamp, 8 W Lamp, 120 VAC, 0.17 A, 60 Hz Frequency, Pre-Heat Start, 50 deg F Minimum Starting, Total Harmonic Distortion: 10 %, Power Factor: 1.08, 1 Lamp, Ballast Factor: 1.08, ANSI C82.1 Ballast Grade, Metal, 3.06 in L x 1.81 in W x 1.59 in H Dimensions