Thanks mnhomestead! Wonderful idea with the Christmas lights, less power too. I never dreamed when I decided to raise roasting chickens this year, that I would get this invested in my laying hens. They are so entertaining!If you do add light to the coop it's best to add the extra light in the am instead of evening hours. You want them to go to roost at usual time. What I did was run a strand of Christmas lights in the coop and have them on a timer, gives off just enough light.
With 6 hens and straw lined walls I think they will be fine without heat. Adding a heat source more often than not can cause issues (fire hazard, power goes out and hens get cold since they are used to heat...) Keep it ventilated, but not drafty, plenty of bedding and roost boards wide enough that they can 'squat' and cover their feet and they will be fine.