I installed three "sheet rock" channels to hold 1/4 birch ply on my van ceiling, then installed three 10w LED rigid strips 4000K and then a cover and they are perfect, I wired them all to channel #1 so they all dim together ( that took some time to figure ). This a a great system also controlled by my cell app. Very happy! some times hard to reach them on telephone, but still 10/10