Thinking of lighting in the coop for winter. WE have a very small tractor that we use as a coop. Could I use a 18" flourescent bulb (like the ones for lizards and aquariums) . If so, just regular bulb or UV blulb---ughhh so expensive. I am soooo concerned about a fire in this tiny area, which is why I thought of the flourescent lighting because of the little heat geneerated bby it. Also, how will an extention cord hold up running from the house to the coop(about 20 ft) in snow and cold weather?