Fulham® Solid State Electronic Ballast, 120 volt, 35 watt, 0.33 amp, 50/60 Hz, Compact Fluorescent Lamp, Plu-In Base, 2 Lamp, 0.87 Ballast Factor, Instant Start, 0.9 Power Factor, -20 deg F Minimum Starting Temperature, 70 deg C, 1 Inch Overall Width