Operates 8 hours on High - 150,000 C.P.Operates 12 hours on Low - 50,000 C.P.Operates 15 hours on Flash - 50,000 C.P.The #SR-2010-09 Halogen/Xenon bulb specs out at 6 volts, 1.5 amps, 10 watts, with a life expectancy of 150 hours.