I purchased 2 of these to go on the opposite sides of my home. They are quite bright.There are 3 settings for low, medium, and bright. They come on when motion is detected and they go off maybe a minute later. You don’t have to set the motion detection or for how long they stay on, as one would with typical motion detectors. Which is what  I love about them!! They are perfect, and I would purchase them again if needed.