The chickens are now 5 weeks old are currently in my garage in a large dog crate. The coop is appox 2 or 3 days from being completed. Still have nice weather here in CT, warm days and the nights in upper 60s/low 70s..Currently the heat lamp is on almost all the time..(if warm out and I am home I will unplug but will plug it back in at dusk) Its keeping the temp around 80 or so. The question is how soon do I shut the heat lamp down for good? They will probably be in the coop by the weekend with no heat lamp.