RetroBasics 4 in.LED trim kits provide the most economical solution for efficiently lighting a space using LED technology with virtually zero maintenance. This LED downlight isdesigned to work in 4 in housings and can be used to provide general illumination in any room. Use as an option to replace legacy incandescent technology in an already installed housing or pair with the quick connect LED housings for a lowcost LED downlight solution. The LED trim maintains at least 70% light output for 50000 hr.