This AC22010A Waterproof Auto On Off Street Light Sensor Control Switch can turn on or off light according to ambient light. Ambient temperature and humidity can't affect it. Place the controller switch above the lamp to avoid any false switching. No other light except natural light should fall on the sensor. It uses a light sensor to automatically adjust the load's on and off times based on the amount of light. During the night, this photocell switch can be used to control the load on various types of lamps, including incandescent, led, and garden lights. Installing the control unit in an area that is brightly lit during the day or next to a lamp that has been turned on is not advised. Street lights are widely used in highways, factories, gardens, ports, airports, farms, parks, and other locations. Both convenient to use and simple to install. superior quality and brand new.