Yes young girls and first time. They are ready for the coop soon. Thanks for info.I'll assume that your girls are young and just started laying. Typically, first year layers do not stop laying over the dark winter months. Skip the lights. Nest fall if you decide to add lights it can be as simple as a string of Christmas lights on a timer.
Ventilation is way more important than heat, they are wearing down coats.What the best way to keep your coop warm? My coop is 8 x 6 foot 6 foot high insulated. I live in Northern Minnesota so winters get -30 to -50 hear in Embarrass. Also have heard red colored light work good for lighting. Thanks