It is battery. I need to figure out how to adjust it to close at a little lower light since it is under an overhang. The LUX reading said 250 is daylight, where it said 210 in the middle of the day yesterday when I installed it. Since they did OK yesterday I did not adjust it. I think if they are free ranging I need it adjusted as the push staying out longer than when they are locked in the run.Is it adjustable on closing time and is it electric or battery
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