Specifications ( at full brightness ) Ballast Type Electronic, Replaceable, Starting Method Modified Rapid Start, Input Line Voltage 120VAC, Input Line Frequency 50/60HZ, Ballast Life (rated) 50,000 Hours Minimum, Starting Temperature -20 ° F, Maximum Operating Temperature - 160 ° F, U.L. / C.U.L. Listed, FCC Compliance Part 18, Subpart C, Lamp Operating Frequency 45 KHZ, Lamp Current Crest Factor < 1.60, Maximum Open Circuit Voltage -- 600V, End of Life Protection.