I've put my chicks in the coop, they are about 2 weeks old, I moved their brooder down to the coop. Do I still need the light? It only gets down to 70 degrees at night (I'm sure it's warmer inside the coop) but during the day, I turn it off because it was like 95 degrees today (central Indiana) very high humidity!!
I'd recommend leaving the light on at night for another week or two. The general rule is first week at 95F, reduce by 5 degrees per week. A red light will greatly reduce pecking, and be sure to monitor that temp. They can usually handle chilly better than too hot.