I've been reading a bunch of posts about heat in the winter and have come to the conclusion that I'll do the girls more harm than good by heating their coop, BUT I still do have a question and hope some of you can help out. We're in Middle TN, where it's not uncommon to have nighttime temps in the 40's for 6 weeks in the wintertime, then suddenly drop into the teens for a week. I'm a little concerned as to how that will affect the chickens. Been thinking of installing a light over the roost for heat on those cold nights. (Seriously considered a light bulb for egg laying purposes, but since chickens have a limited number of eggs, didn't want to "burn them out" so to speak). Can anyone tell me, 1: if I'm thinking clearly on this point, and 2:Should I use a red heat lamp for heat instead of a regular light bulb? Been ages since I've had chickens, and never in TN. I've forgotten how much I knew, and am beginning to figure out how much I've forgotten! Many thanks in advance!