Advance SmartMate® Compact Fluorescent Ballast, Electronic, 4-Pin CFL Lamp, 42 W Lamp, 93 W Wattage, 120 to 277 VAC, 0.33 to 0.78 A, 50/60 Hz Frequency, Programmed Start, Total Harmonic Distortion: 10%, Power Factor: 0.98, No Dimmable, 2 Lamps, 4-Pin GX24q Lamp Base, Ballast Factor: 0.97, NEMA 32 Enclosure, 75 deg C, Metal, 4.55 in L x 3 in W x 1.29 in H Dimensions