Actually Maugan they do build some good lights.

The problems with trailer lights always seem to come from exposed and corroded connection. So simply seal everything up and have no splices in your wires.

The best ones I have found simply say "Davis". I have no idea who really makes them. The lights are double o-ring and grease sealed. The bulbs use screw type holders, no springs. There are no splices in the wires. One end is sealed to the light and the other end goes to a terminal block at the front of the trailer.

I bought them from a place that makes expensive aluminum trailers for power boats. When I called looking for more, I found they no longer use them, they have something better, sealed LED's.

The lights are sealed assemblies. With a 100, 000 hr bulb life it is unlikely that you will ever need to replace one. They epoxy pot the wires to the lights and lead them to a terminal block.


Two notes

LED's either die in the first couple of hours or go forever. You might want to power the lights overnight before you spend any real effort on them.

Use the best wire you can find