Monitor passersby and trespassers with light and an alert. For facility security, these light controls notify you on a smartphone app when they sense motion and turn on. You can also use the app to link additional lights and configure which lights turn on when movement is detected. Also known as occupancy sensors, they use an infrared sensor to detect changes in heat sources, so they need a direct view of people. The included mounting bracket swivels 90°, so you can install them on your wall or ceiling.