I do not currently have the ability or the finances to run electric to the coop. Is it just ANY light or does it have to be a specific wattage? Specifically, I was wondering about the round click on lights that are battery operated. Would that induce laying as well? We have a small "barn" that is the size of a shed. I was thinking of trying two of those in there. I haven't had eggs in MONTHS. They are not molting. They are getting plenty of the correct food and have been wormed, etc. Light is my last thought.