This LED emergency backup driver will help to ensure the fixtures will not go out in the event of power loss. It helps to detect the electrical load of the LED fixture and adjusts the output accordingly. This fully enclosed emergency back-up drives dedicated LEDs at 12 Watts producing 1200 lumens for at least 90 minutes. The battery back features a quick connect and dual flex conduit to fit 1/2" knockouts. The indicator light lets you know the system is operating correctly and active.