the weather is starting to warm up 70s next 4 days, and 40s- 50s at night. i have 17, 3week old chicks i made them a 6x4 pen out in my big 10x12 shed coop they have there wing feathers and getting there head feathers, i have a 100 watt bulb i could use at night. just to be safe. what do ya think. there flying out of the little brooder there in now during the day so they must be ready for the coop.