Hello, first time chicken owner here and we live in Minnesota where temps in Winter can range from 35 to -20 degrees and need some advice for wintering them. We have 8 chicken in a 10' x 6' x 6' tall coop and I have 3 heat lamps that I have had on almost the entire time, 24-7. After reading some of the posts here, should I be turning off the lights at night when it gets dark (about 5pm) and then gets light about 7am? My heat lamps are set up with clear bulbs and serves as both heat and light, so if I shut off the lights, there would be no heat. Or should I switch to red bulbs and leave them on 24-7 instead? The chickens are 6 months old and been laying anywhere from 5-8 eggs per day. The girls are spoiled and want to do right by them. Thanks