I made the cookie tin heater with the Christmas candle type of light with a 40 watt chandelier bulb the other evening. It cost me $1.25 total and now finally there is no frozen water in the morning. To think I was going to shell out $40 for a manufactured heater!!! I know the candle light...
I only have an extension cord running to my coop. It is not hard wired with a GFI. Can I just plug this into the powerstrip I have out there without a GFI?