I agree. I was kind of hoping that sort of study had been done and someone out there would know. Or...there would be some kind of general consensus from the long time chicken keepers.
Actually, from what I've been reading, seems like most folks who raise flocks for meat and eggs don't run into this issue because they cull their flock. We don't. They're basically pets that happen to lay eggs. Since my daughter has named them all we'll eventually end up with an old bird home.
I think we'll go with our gut and not light in the winter.
Oh well, just curious.