LED's don't like to be dimmed, but they do step down in brightness. I have an LED array in both of my dome lights (added a second to the cargo area) and they don't fade off like the old bulbs, but they do step down then go off. Not an electrical engineer, so I have no idea if that is shortening the life of the bulbs.

Sorry, back on topic. V-C-Az, the lights look great, and being mounted on the inside of the door gasket they should stay out of any kind of weather.... unless you drive around with your doors open just to show off how cool they are.