I currently have 14 Plymouth rock barred chikens, 1 rooster, they are about 18 weeks old, I have switched them from mash to layer pellets, and have been told they will need additional lighting in coop over the winter months for proper laying. Is this true? And if so can I use led lights? I Would set up with solar panel and led would use allot less. When should I expect to see eggs? Thanks for anty and all input.