I have been looking around a lot, researching what I might want to do for the coop and I found a few people who have put up outdoor, led, christmas lights and put them on a timer just to lengthen the daylight by a couple hours. I don't know what it will cost for a strand of christmas lights vs one big lamp, but it sounds like a safer way to light things up. I also have seen a microwavable heater pad for dogs and cats that stay warm for 10-12 hours. Some people heat it up and toss it in the coop for a little extra warmth. It is plastic so easily cleaned and doesn't take electricity. Sounds like a good idea to me!