AM, your best bet for figuring out the sex link thing is to go to the charts in the first post of the Sex Link information thread. Lots of good info there. I make sex links from my EE roo x Dominique and SLW hens.
I have done nothing different with lighting. But my egg count and size have taken a recent jump. Was averaging 7/day. Now size and count up. 12 eggs 2 days ago, expecting the same today. Did switch from pellets to mash in my FF.