ok, now I understand about the light bulb. So we could put a small wattage bulb in there to keep the water from freezing after all. We put a reg. light bulb in the unit that came from the feed store as we found a heat lamp was much too hot when I used it in my brooder. It has a guard around it so hanging down it should work, I hope! We almost went into Springfield yesterday but glad we didn't as they had lots of bad accidents from the ice that hit. Be safe and stay warm.