Hey Jasper,
Every winter we've hoped our chickens would keep laying and every time they stopped. We tried lighting and fancy heating, and eventually just accepted our fate. But this past summer, we started mixing up our own feed, adding hot sauce (an old wife's tale but it seems to help them keep laying). Been trying hard to mix enough protein into the feed in the form of fishmeal, peas, and sunflower seeds. So far they're still laying! Its been pretty cold and gets dark at 4:30. I think if they have enough protein and nutrients and keep laying, it won't be a stressor to them. Best of luck!
Gabe