When placed correctly, indoor motion lights provide great convenience, function and savings. The principle is simple - the light motion sensor control is located in a wall switch unit, which is added as a replacement for the normal light wall switch. Once you add a couple of indoor motion light sensors to a few rooms in your house, you will wonder what you ever did without them. The motion sensor switch uses your existing house wiring, and is very easy to install. Instead of the normal switch, the wall switch plate for the motion light sensor will look like the picture above. After using these light sensors for many years, we've listed below some of the top uses for these products in an indoor environment.