Dh is building me a new, bigger chicken house. I'm wanting him to put light in it because I'm in Massachusetts and the days are getting really short here. He wants to put some heat source in there for when it gets below freezing for weeks at a time. His idea at this point is to run a string of Christmas tree lights around the inside of the coop, at the top. Not colored lights, just plain white bulbs. He bought a 25 foot string of lights, changed all the colored bulbs to clear ones and is convinced that this will work. I'm thinking the chickens might try to peck at the light bulbs. It's a new string of lights, so they throw a little bit of heat, but not much. In a closed coop it will add heat, but I plugged them in and held the bulbs in my hands to test the temp, and they don't get hot enough to deter anything from touching them. Good idea? Bad idea? I don't care who is right at this point, I just want to make sure I'm not going to kill or injure any chickens. Any help very much appreciated.