Direct lit and Edge lit LED Flat Panels are all the rage these days for retrofitting ceiling lighting. They are particularly ideal for replacing in-ceiling troffers, and they come in many common grid sizes like 1x4, 2x2, and 2x4. That is not all they are good for though. New LED technology allows these flat panels to be very thin, down to a half inch. That means they can be mounted to walls and ceilings or suspended from cables. This new technology allows versatility that has not been available in the past.