I was wanting to add back up lights to the trailer but did not want to drill holes in trailer. I went to see my brother who sells Truck parts. He gave me a pair of Trux Brand Oval Stop and back up lights in one. The work like any other sealed led oval light. When you put vehicle in reverse the lights turn white / backup. Here is he link to check them out.
https://truxaccessories.com/led-ligh...hite-12-diodes