Some people routinely put a light on a timer so that the chickens have a 14 hour "day" year round. Set it so it comes on early in the morning, rather than stays on in the evenig. That way they aren't plunged into darkness at bedtime, caught off the roost. You only need a small amount of light. I used a 40W incandescent bulb in my rather large coop, though 25W probably would have done it. Some use a string of white Christmas lights.
This approach works better in some flocks than others, and probably depends to a point on where you live. I did it one winter and it made very little difference. But nothing will make them lay every daay or even 5 or 6 days a week. They will stop for moulting, if nothing else. Even birds who lay better in winter with day lengthenng light still often lay fewer eggs in winter than in summer.