I'm not entirely sure how that would be possible.... not without turning off the heat in the house. And I don't think that would make my family too happy.
This has been day four that I have been keeping the lights off in the room where her coop is. And it has been 5-6 days since I have gotten an egg from her, when she normally lays 4-6 eggs a week. I have also noticed that her behavior is very different. She is more tired and slower than usual. She has also been dropping a few feathers here and there. Maybe she is finally molting? I guess we'll have to see...