Again, research does not support your argument - please read the attached link. Most of us with backyard chickens do not have roosters anyway, and are not breeding show birds or any birds for that matter.
Not to pick a fight, but most of the statements of the previous two posts are not backed up by any research conducted by the top agricultural universities in the U.S. or Canada. That research says artificial lighting does the hens no harm, provided they get proper nutrition and are allowed to...