I recently replaced the brake light bulb and bed lights with LED bulbs for my 2020 RAM 1500 Limited. (All the bulbs on the truck are LED with exception to these 3 (192 bulbs).
I had read about a water leak but with 30k miles I figured the seal sounds be in good shape (trucks 3 yrs old), and wouldn't worry about it.
Well tonight or rained and after getting back & unpacking from the beach, I noticed the water leak in the headliner. It wasn't bad, but I didn't want any leak. I pulled the light off (4 Phillips screws) and upon inspection found that when I reassembled it last, one of the wires had been crimped by the housing surround. This caused a gap and hence water leaking into the cab. Stupid 2 min fix and we are FIXED!