Bodine Electronic Emergency Fluorescent Ballast Input Voltage 120/277V AC Number of Bulbs Supported 1 Max Bulb Watts 40 W T12 T8 Ballast Bulb Type Initial Lumens 500 to 600 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