https://www.towingandtrailers.com/pr...dicator-light/
I spoke with the owner, who was very keen to talk about them in detail. These have a 3yr warranty. He has sold thousands & the only ones he's had back have all got black rotten copper wiring with the damp creeping into the unit. With adhesive lined heatshrink I think these will last decades. I double heatshrink them.
I bought some early ones (different model) which have remained waterproof, but the LEDs failed due to poor design. He wasn't suprised & explained he had seen problems with the early ones & had detailed discussion to get a better model from the supplier.
I have no affiliation, but the conversation I had was impressive enough for me to support them.
edit: He also didn't point me towards the pricier stuff