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This is an arguement many have.
If you provide light, the birds will lay.
If you do not provide light, they will not, or depending on where you live, will lay internittenly.
Some say it is better to let the pu;llets take winter on, without laying, in that the protein needed , as well as calcium & other nutirents, can be used by their bodies, instead of used to 'make eggs'
In a natural sense, we should let them be.
They need all the fats & proteins to be used for their heat & health in cold.
But, some do supply extra light in an effort to get eggs.
It depends on how cold your hens will have to survive.
In warm climes, is should not be an issue.
In severe cold, I would let the birds survive, and not force them to lay.
It is up to you, pertaining to your climates.
Your new pullets hatched in June should lay intermittenly thru winter's dark hours if provided no extra light.
But if you do apply light, they should all lay daily.
I have my coop lights come on about 6 AM, and off by 5 PM, so the birds can roost before dark falls.
The reson I have lights, is because it is dark in the coop year round.
I do not leave lights on for the sole purpose to force lay.
Hope that helps, and it is just my one opinion.