I am currently building an outdoor brooder and I wanted to see how everyone else had built theirs. I want to be able to keep my chicks outside after about a week. I have built a 2" X 6" box out of two by fours and 1/4 in plywood. It stands 30 in tall and will have a wire floor, 1/3 of it 1/4 in and 2/3 1/2 in for older chicks. I am really wondering would it be possible to keep this design warm with a 250 W heat lamp outside on cold nights. I am in SC and it gets into the 20's and thirties. Let see some photos and advice would be appreciated.