My new chicks are 7 weeks old now. Having never raised chicks before, I was nervous about having a light for them. I had a small light (7w) I turned on for them at night for the first week. I would go out every night for the first week and pick them up individually and take them out of the run, up the ladder to the coop and shut the door, and then turn the little light on which was just outside a window of the coop. This weekend I didn't put them in their coop, or turn the light on. I went out there the first night without the light after dark and they were up on their roost inside the coop all asleep. Now i go out there around 8:15 and watch my Delaware herd all of them up the ladder and to bed. She is the same age and seems to have taken control of my flock of five. They are fine without the light.