Sylvania QUICKTRONIC® Electronic Fluorescent Ballast, High Efficiency, FP39T5HO/FP24T5HO Lamp, 39/24 W Lamp, 83/81 W, 120/277 VAC, 0.7/0.3/0.47/0.21 A, 50/60 Hz, Programmed/Rapid Start, -20 deg F Minimum Starting, Total Harmonic Distortion: 0.1, Power Factor: 0.98, No Dimmable, 2 Lamps, Thermal Protection: Class P, T5 Lamp Base Type, Ballast Factor: 1, NEMA 1, 70 deg C, Remote Mount, 16.73 in L x 1.18 in W x 1 in H