I don't leave the light on at night, last year it didn't matter at all , but this year no eggs, so I guess I'll try leaving it on. Also wondering if the nest and roosting areas are an issue, they go outside during the day and come in at night
Age seems to have a bearing - my 7 month old hens are laying without any unnatural light at all! In the past, once the hens get to be 2- 3 years old they start taking breaks in the winter. Guess I would too.