You would not want a light to stay on all night. Are you close to electricity? A Christmas timer---comes on a dusk and can stay on for 2 hrs or more----(different settings) is all you need with a night light that some use in the bath room, hall way, etc. I do this all the time to draw chicks into their sleeping area----but only need it 2 or 3 nights most of the time. You can get a little flash light that uses 1 AA battery and fix/secure it where it will shine up in the ceiling so it lights up the inside of the coop and just let it burn all night or till that battery goes dead, then put a new one in the next evening being you are only going to be using it a few nights.