Sunlite 40500-SU BAL500 Linear Fluorescent Ballast With Battery Back-Up, 17-40 Watts, 120/277 Volts, 500 Lumens, Up To 90 Minutes Reserve Power, UL ListedThis Sunlite ballast features a built-in battery for up to 90 minutes of light in the event of a power outage. Battery charges automatically when the power is on and automatically recharges in 24 hours when power is restored. For use with 17 to 40 watt fixtures using T8, T10, or T12 single or bi-pin lamps. Works with 120/277 Volt fixtures. 500 Lumens. 60Hz.
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