What method for keeping water from freezing takes the least amount of energy to run them if all are temp controlled? I know breaking ice with a hammer or changing water several times a day is cheap to some, but my work schedule prevents this from being an option. So, I am wondering if anyone knows, in general, if the heated water buckets are cheaper to run or a 250 watt red lamp? Does anyone know the wattage difference of the various water de-icing options? I am currently using 250 watt red lamps so it doesn't bother the livestock (they are well secured) but if buckets would be cheaper on my electric bill I'd rather use those. Any ideas?