Short days and egg laying question

Okay, here goes.... If your hens haven't started laying yet, as the days are starting to shorten, will they not start laying? Will they start and just not lay much? If your hens just started laying a month or so ago, will they stop laying, slow down laying? Obviously, I have several hens that have not started to lay yet, but most just started within the last 4-6 weeks. Hoping the last of them will start even with less light and I'm not sure if I want to supplement light or not. Also, from what I've read, they won't molt this year, so will that make a difference in egg laying volume? Wondering what to expect ...any thoughts or advise?

Thanks!