Bodine Electronic Emergency Fluorescent Ballast Input Voltage 120 to 277V AC Number of Bulbs Supported 1 2 Max Bulb Watts 55 W Type A TLED Ballast Bulb Type Initial Lumens 730 to 1400 lm Galvanized Steel Housing Material 13 5/16 in Length 2 1/4 in Width 1 3/16 in Height Low Profile 90 min Emergency Illumination Time 24 hr Recharge Time