This is my first year raising chickens and seem to learn more and more each day. I live in north central Ohio and about 3 weeks ago my hens stopped laying. I was told to add light to my coop and put them on a timer to give hens 14-16 hours of light. I did this about 2 weeks ago. I got timer set for 15 hours of light. I added about 500 lumens in my 8x8 coop. Is this enough lumens??? How long till they lay again???