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Input Voltage.............................................................. (Dual) 120/277V, 60Hz Input Wattage................................................................................. 2.5 Watts Lamps Operated............................................................... Most 2'-4' 28W T5 & T8 linear fluorescent lamps Emergency Operation...................................................................90 minutes Initial Illumination................................................. (1) lamp up to 500 lumens Operating Temp............................................................................0° to 55° C Battery..............................................................................24 Hour Recharge 7-10 Year Life Expectancy Weight............................................................................................... 2.0 lbs. Approval..........................................................................UL and CUL Listed