Infrared light sensors can detect the infrared radiation the human body movement, when the human body to enter the detection region, lights automatically light up, automatically extinguished after the human body leave. During the day and its light does not shine at night only. The product can be used as business, shopping malls, warehouse, hotels, Family of corridors, staircases, bathrooms, etc. Automatic lighting switches, is a novel, convenient and free access, multi-purpose switch.