Here is a solution for the trucks. ever see the old war time vehicles or "old style" cars that have the shades over the lights kind of like the shades over STOP LIGHTS?
install them. ALSO here is an odd but effective solution. WAX THEM. a quick coat of wax before the storm hits will make them slippery enough to be less able to "hold" snow.
also wipers would also work well on tail lights :-) but at that point the added cost of the wipers and their maintenance might exceed the cost savings of the LED.
Another solution might be to use glass or crystal lenses and use the lenses as the heatsink for the LED's
LED's actually make a pretty decent amount of heat but its not directed at the "lens" like a regular bulb. so embed the LED in the lens so they "heat up" the lens.
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