I have replaced all of my lights with sealed LED submersibles. No problems so far. Seem to hold up well. My one trailer has had same ones for past 3 seasons. Well worth it.
Why doesn't the industry sell a bulb that can handle going under water. I seem to have to replace one or the other almost every time I put the trailer in the water. Any input on this matter?
I think that the difference between regular lights that blow and the ones that don't is the ground. If your ground is not 100% the lights will burn hotter and blow when they get wet.