17 Watt 20-50VDC Output 120-277V Input 90 Minute LED Emergency Backup DriverLED Driver Cross Reference: Universal ELD20UNVL Keystone KT EMRG LED 20SD 2000 EN DF ESL Lighting ESL EMG SL6 CSC 18W A commercial building's emergency and exit light requirements mandate active lights in egress exit routes. We offer a wide range of hard wired and or battery backup emergency lighting that includes LED emergency lights, LED emergency exit signs, LED emergency light combos, LED emergency tube lights and LED emergency retrofit kits,