Loren,
Have you tried out your 'Light Heater' yet with actual cold precip? I am seriously considering a heater having had a freeze issue during the last freezing rain storm. My only concern based on an experience with our camper where during a bad thunderstorm while driving, water splashed in through a small gap in the tail-light lens, hit the hot lamp (4way flashers were on in the storm) and the bulb shattered... I am wondering if the same might happen with the bulbs in close proximity to the water pouring in the buckets.
Might be an idea to put a shield between the lights and the center tipping buckets. I like the idea although I think I might get colored bulbs (blue maybe) to produce more heat than light... Also, some aluminum foil around the inside surface of the outside of the top funnel (like that included with the Davis heater)...
Thoughts?