So I've heard over and over again that most chickens are relatively cold hardy and don't neat supplemental heat in the coop. The mom in me would feel much better, however, if they at least had a 75 watt bulb in their coop that they could huddle next to in case they wanted the extra warmth (mainly at night in the winter). With that in mind, I have been providing my 6 wk olds who just started being outside full-time, a 75 watt standard lightbulb for heating. I was concerned that the constant light at night might be bothersome. Should I switch to the dark colored bulbs specifically made to provide heat without bright light, or would the extra light at night perhaps up the egg laying during the winter, once they're old enough to lay? -Michelle