Hm never seen an LED marker light that had a removeable lense, most are sealed? Except where an led bulb is installed in incandesant fixture. Be really curious to see picture of that-more so the 'dimming' bulb arrangment. Unless as noted fixture has multiple LEDs and a few have stopped working the only other way it could 'dim' is a serious reduction or restriction in power or ground?
I like the appearance of LEDs & generally about 1/4 current draw but I'd be hard pressed to change out all 14 of my marker lights w/ 194 bulb which might draw 7 amps. While less likely to allow water intrusion, be nice at least on nose, LEDs still have wires & screws passing thru skin so its not an install & forget. Especially if converting over older lights, like mine, that have a prexisting 1" hole in camper skin. They arent the cure all to fix all IMO. Nice but still need to inspect/recaulk as primary water intrusion I dont think is from behind the lense.
All that said when I change or add lights they are LEDs-mostly due to I simply like them. I have a brand new set of LED cab lights waiting to replace failing/leaking LED cab lights.
