I ran the Hella H4's probably a million miles & "water resistance" seem to be enough. A trick that I learned about flying rocks that do a chip that penetrates the lense & leaves a BB hole - Daub a little silicone over the hole before rain/moisture gets inside the housing. You can do it at any temperature, and it will get you home. Here in the North, one carries spares anyway, but its not always convenient changing them on the road. The neat thing about Hellas is they have a wider field of view then others, illuminating the ditch better. In my book, moose have the right-of-way. My Deuce has them - they fit right in with 24V bulbs.