We had a huge storm in New England last night, and we lost power for almost 9 hours. These LED motion-sensor lights were a godsend. They shine really bright white (60 lumens). They have a motion sensor to automatically turn the lights on, and they turn themselves off after 30 seconds if there's no motion. I used the adhesive tape on mine, but they come with screws also.All I had to provide were the batteries.