Heat generated by these lights is much lower than conventional halogen and HID, but there is still heat generated at a level that prohibits snow/ice buildup as far as we can see. We have hundreds of lights up in the Alaska region, 50-60 on the "Ice Road Truckers" crew alone. All of the camera trucks and 10-12 of the drivers are running them with rave reviews. We have not had one complaint on buildup. The E-Series runs about 135-145 degrees mostly on the rear of the unit on the heatsink, it keeps the light warm enough to prohibit freezing over. Good question though, thanks for the inquiry.
Taylor
RIGID Industries