The ALTSA Emergency Back-Up System converts almost any LED luminaire to an Emergency Luminaire. This unit can be utilized as a Maintained or Non−Maintained Emergency Back−Up System. For use with integrated luminaires up to 25W, or for luminaires with external drivers, up to 100W. Back−Up times are 90 Min at 100% light output for integrated luminaires, and 90 minutes at 25% light output for non−integrated luminaires