Very interesting........I see all points. As for me I originally got my chickens for pets. Even as I prepared for them eggs didn't even cross my mind. Then one day my light came on, duh...we're gonna have eggs... then I began to consider the lights no lights thing. I really love my girls. They each have such unique personalities. I think with my existing girls I will not use a light. If on the other hand decide to go into the egg business a light would be of value. It's just my DH and me and neither one of us eat that many eggs. Just some of my thoughts.