I've been using a Rubbermaid container in my bathroom as a brooder. The temperature stays about 65-75 and even 80 directly under the lamp. The chicks have been here from 1-3 weeks. They are all grouped together. Some of them are getting too warm and starting to perch on the sides of the plastic container at night. I moved the heat lamp away and have started turning it off during the day. They haven't ever acted cold but are not feathered all the way. Today it is 63F outside with the low tonight being 48. I took them out to the shed we are converting to a chicken coop. I used a dog play yard to make an area, gave them pine shavings, hooked the heat lamp up and put them in it. I have two thermometers. The one closest to the heat lamp is reading 78F and the one farthest away is reading 65F. This is the set up. Do I need to bring them in tonight or will it stay warm enough? The shed is not yet insulated but the heat lamp will be on all night. Any suggestions?