Emergency LED driver for use with new or existing LED luminaires. Driver's circuitry automatically switches the luminaire between emergency and normal power operation during power loss and restoration. Operates at a reduced level for a minimum of 90 minutes to allow safe egress during power outage. Upon restoration to normal AC operation, the emergency driver returns to charging mode. Input Voltage: 120-347VAC Output Voltage: 170VDC Wattage: 20W Illumination Time: 90 Minutes Listing: cULus listed and Certified to California Title 20 standards