Chickens are sensitive to how many hours of daylight, but they are even more sensitive to whether the days are getting longer or shorter.As far as lighting up the coop for extra time i have no plans on doing so as i do not want them to start laying until maybe the end of Feb. They hatched August 1st. So we will just play that by ear.
So if you set the lights on a timer to provide 10 hours or 12 hours of daytime (as @Alaskan suggested), and keep the amount constant, they should not begin laying until the days get longer than that in the spring. But if you let the days get really short and then increase the day length, it might trigger laying. So the trick is to add the extra light before the days get that short.
If your short winter days are naturally longer than 10 hours, it may not be worth trying to length the days. They will probably have enough hours to eat in that case. The further north you go, the more extreme the day length gets (short in winter and long in summer), and I'm not sure what it is where you live.
People who want winter laying will often provide 14 to 16 hours of light each day, which is not what we're suggesting here.