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Input Voltage.............................................................. (Dual) 120/277V, 60Hz Input Wattage................................................................................. 3.5 Watts Lamps Operated.................................Most 2′-4′ 28W & 54W T5 fluorescent lamps or T8 lamps incl. HO and 36W-55W 4-pin long compact lamps Emergency Operation...................................................................90 minutes Initial Illumination............................................... (1) lamp up to 1300 lumens Operating Temp............................................................................0° to 55° C Battery..............................................................................24 Hour Recharge 7-10 Year Life Expectancy Weight............................................................................................... 3.0 lbs. Approval..........................................................................UL and CUL Listed