Bodine Electronic Self-Testing Fluorescent Emergency Ballast Input Voltage 120 to 277V AC Number of Bulbs Supported 1 Max Bulb Watts 55 W 4-Pin Long Compact T5 T5HO T8 T8HO Ballast Bulb Type Initial Lumens 600 to 1325 lm Galvanized Steel Housing Material 21 1/2 in Length 1 3/16 in Width 1 3/16 in Height Low Profile 90 min Emergency Illumination Time 24 hr Recharge Time