Advance Electromagnetic Fluorescent Ballast, Series: Mark III, 32 W Lamp, 120 VAC, 0.64 A, 60 Hz, Rapid Start, 50 deg F Minimum Starting, Total Harmonic Distortion: 0.1, Power Factor: 0.97, 2 Lamps, Thermal Protection: Class P, Ballast Factor: 0.94, Metal, 9.5 in L x 2.38 in W x 1.5 in H