Not sure how old yours are, is this their first winter laying or are they older? When was the last time they molted? Most importantly, are they molting now?
A reduction in daylight can trigger a molt. If you are seeing a lot of feathers flying around that's what happened when you turned that light off. That may be a partial molt, it may be a full every-feather-on-their-body molt. If that is what happened the molt has to run its course.
A change in lights can cause a hen to stop laying even without a molt. When that happens she makes changes to her internal plumbing and the development of ova to make yolks. It takes time for her to redo her internal plumbing back to laying mode. How long depends on how far she got into shutdown mode. Could be a few days, could be weeks.
I personally do not extend lights but many people on this forum do. There are potential consequences to extending lights as you found out. Like many other things with chickens it is often a learning curve in figuring out what works for you. You are not the first one that has done this.
While it is always a good idea to check on the health of your flock, like checking for mites,lice, or worms, this is highly likely due to your turning off the lights. As long as they are acting normal the lights is almost certainly the cause.
Good luck!
