I like the light bulb idea. Back in the 1900 shortly after electricity was invented my folks had an electric water pump. To keep it from freezing they had it in a small dog house like with a light bulb. I think it was 75-100 watts and was enough heat inside the dog house to keep it from freezing up on the cold night.
5 watts huh? A brake or turn signal bulb is 5 watts I beleve. How about putting a few of them in your filter box? Maybe the photons will help to boost your fuel economy?
