I live just south of richmond va. I have 7 chickens and 4 ducks. Their coop is aproximately 8 & 1/2 × 6 & 1/2. I built 2 layers of nest boxes and added to the back side and a roost on the inside. It is not insalatted but 90% is covered by plywood. It has a wood floor and i cover the floor with pine shavings. I was wondering if i should keep some type of low light or heat light on for them at night and if so at what temp should i use it at. I had bought a 250 watt heat lamp for them when they were days old til about a month or so. I need some advise form the more experienced as like my name i am a 1st timer. They were hatched may 1st 2015.