We use clear led rope lights and a timer. They are very flexible and easy to install and don't get hot. The lights turn on around 5:15p.m. when the girls are going into the coop and turn off at 8:00p.m. We have 8 girls , 4 are molting, 3 quit laying, and only 1 was laying ever other day. After two week of extra lighting our egg production increased from one girl laying eggs to three girls laying eggs. Plus we started feeding them plain yogurt to increase their protein and calcium. This helps the girls who are molting and the girls who are laying.