Our girls are fast out growing their brooder boxes. We are planning on moving them to the coop and making it into a " brooder" the door to the run will not be opened. The coop is inside our garage and 2 of the walls have been insulated. I am thinking we may have to put both lights in it. Anyone else done this? We have 3 week olds and 2 week olds that we need to mix. I should think they will be plenty warm. Their brooders are also in the garage right now.