I know everybody asks this question, and I just read about it in another post, but my situation is a little different. I just finished building a coop and purchased 3 hens from a breeder who free ranges. He does not use artificial lights in his coops. He told me to turn on their light at 3 am and then let them go to bed with the setting sun. Sounds good to me. I know it was traumatic for them to be taken away and put into a totally new environment. I have had them for just over a week now and have been treating them with goodies every day and keeping a regular routine of feeding, water, lights, ect. How long should it take before the extra light has an affect? Do they need extra time to acclimate? Just curious. I will keep them even if they don't lay until spring. They are just such sweeties!