One person did. :-)
I kept chickens in northern Utah for 4-5 years and never used lights. I closed the chicken run so they couldn't go out in the winter and then put opaque plastic over the whole coop making it like a like a green house to keep the wind out and warmth from the decomposition in the litter in. I was keeping Old English Game at the time which did well in the cold. They don't have long wattles and our cock bird was dubbed so we didn't have problems with frost bite. The hen on my then uncles farm in Wyoming was also shut in and fit with opaque plastic in the winter. They had light on in their hen house, so it stayed above freezing all winter (the 4 feet of snow pack around the coops seemed to help insulate too).
Edited by GaryDean26 - 11/12/13 at 12:12pm