Application: This 20W LED Emergency Light with Backup Battery is suitable for below two kinds of led fixtures. 1. If LED lamps input power higher than emergency output power (20W), then this LED fixtures must be with 0-10V or 1-10V dimmable, LED fixtures power150W max. Like led panels, led troffers, led linear shop lights and etc. 2. If LED lamps input power less than emergency output power (20W), then this LED fixtures no need to have dimmable function, like led tubes, downlight and etc.