Sylvania QUICKTRONIC® Electronic Dimming Ballast, High Efficiency, FO32XP Lamp, 32 W Lamp, 114/27 W, 120 to 277 VAC, 0.96/0.4 A, 50/60 Hz, Programmed Rapid Start, 10 deg C Minimum Starting, Total Harmonic Distortion: <10%, Power Factor: >0.98, Yes Dimmable, 4 Lamps, Thermal Protection: Class P, Ballast Factor: 0.05 to 0.88, NEMA 1, 70 deg C, 16.7 in L x 1.7 in W x 1 in H