Ah, the great light debate.
I suppose it comes down to how much "need" you have for winter eggs.
I let my hens have a winter rest, so no lights in my coop. If I had year round customer demand for eggs I would probably reconsider.
The eggs I get in winter months are usually from pullets reaching POL in late fall or winter. That's why I keep getting a few chicks each year.
I picked up a couple of roos last summer, so maybe I can forgo buying chicks from the feed stores this year. Hopefully a hen or 2 will go broody come spring. I have been getting fertile eggs this past month.
Everybody molts just fine here. Very few do a 'severe' molt, I think more likely when they are fed the lower protein layer feed. And obviously many do stop or seriously slow down their egg production anyway in the dark months, but getting something rather than zero works for me.
I don't do any extended light during the winter months. I do turn on the coop light during the winter when I go in to clean in the morning and turn it off when I check on them at bedtime. Only because it's so dark in the coop. The hens are born with as many eggs they will lay in their lifetime. As I look at it, they'll just stop sooner. And I think a rest is good for them. Nature. The last hen that I rescued has laid an egg every day till mid December. Then maybe skipped a day here and there. She's again laying most days. Don't know what breed she is. Got 4 eggs out of my 6 remaining chickens.
John mentioned a fall Chickestock. I asked August or September. No response. Well, won't be putting deposit on pavilion unless there's a response....
Snowing. Looks like we got a couple inches so far. Looks pretty.
Have a good day, all. Stay safe