A lady at church and I were discussing this ..this morning. LOL Between us we have over seventy chickens and I am only getting 4 eggs per day and she is getting about 4 or 6. Plus, I have orps! I will not put a light in there as it is not good for them to be forced to lay...BUT THAT IS ONLY MY OPINION. Follow your own beliefs on that one. Nothing is written in stone.
I just had some of my birds molt and now more are starting. My egg count has been down. I think mine is a combination of molting and it's been hot here where we are in Florida. They have shade and a fan in their coop but have still slowed down.