We have recently finished our coop and working on the run. We only have 7 chickens so it is not a huge coop 4' x 7'. We are trying to avoid running electric to it. We were thinking of a solar light to help with light when needed. I found some solar lights at our local Meijer's store the other day in the gardening section that were 50% off. It is a "spotlight" that is shaped like a rear view car mirror and mounts to the wall. The solar panel is on a cord that we ran through the rafters and mounted on the roof outside. It has a off on switch, but the best feature is that it comes with a remote control that we hung at the entrance door so when you enter the coop you can turn it off and on. I was surprised to find this in the gardening section as so many of them are auto on/off - dusk to dawn lights. I am thrilled with it...especially for $12.50! I bought several! They also had a solar spotlight that we hung outside that has a sensor on it that turns on when something enters the area. It was 50% off so we bought it for 15.00.