After we no longer needed the heat lamp we put a small 15 watt bulb in the ceiling of the coop. I don't know why but I think we had read to keep a light on. They have roosts in there and they all seem to sleep with or without the light on. They are about 9 weeks now old now. We have a divided coop with a wood partion for some meaties for a couple more weeks. They also seem to like to fly up to the top of this wall and sit there and watch the meaties.