Electronic Emergency Ballast with Backup Battery and Charger, Input Voltage: 120/277V, 90 Minute Illumination Time, 24 Hr Recharge. For use with the following 350-450 Lumen Compact, Linear & U-Bent Fluorescent Lamp Types: (1) 17-40W, 2-4 ft T8, T10, T12 or 4-Pin Long Compact.
