Bodine Electronic Emergency Fluorescent Ballast Input Voltage 120 to 277V AC Number of Bulbs Supported 1 Max Bulb Watts 42 W 4-Pin Compact Ballast Bulb Type Initial Lumens 300 to 750 lm Steel Housing Material 9 7/16 in Length 2 7/16 in Width 1 1/2 in Height Standard Profile 90 min Emergency Illumination Time 24 hr Recharge Time