Hi everyone! I just finished building my winter coop in my garage- it's a 5x5x9 shipping crate (placed on its side-so the floor space is 5x9). I thought of everything except light and heat. I have one heat lamp with a regular heat bulb, but I don't think I can keep that on all night due to the light factor, right? So how can I keep my 8 chickens warm at night? any suggestions? I can't have anything too big, as my chickens don't have too much room as it is.