LiteGear Interruptible AC Power System 120/277V AC Input Voltage 48V DC Output Voltage Number of Bulbs Supported 1 Max Bulb Watts 220 W Fluorescent Incandescent LED Bulb Type SLA Lead Calcium Battery Type Emergency Illumination Time 90 min CA Title 20 Compliant Yes Surface Wall (Up to 1000 ft away) Mounting 11 3/4 in Height 6 3/8 in Width Steel Housing Material