Advance, ICN2TTP40SC35I, Compact Fluorescent Ballast, Electronic, 40 W Lamp, 68/67 W Wattage, 120 to 277 V AC, 0.25 to 0.57 A, 60 Hz Frequency, Instant Start, 0 deg F Minimum Starting, Total Harmonic Distortion: 10 %, Power Factor: 0.98, 2 Lamps, 4-Pin 2G11 Lamp Base, Ballast Factor: 0.88, 70 deg C, Metal, 9.5 in L x 1.7 in W x 1.18 in H Dimensions