The product adopts good sensitivity detector,integrated circuit. Identify day and night automatically. Time-delay is added continually. It gathers automatism,convenient safe,saving-energy and practical function. The light is suitable for indoor ceiling mount (concealed installation).Can be used for home garden,living room,bedroom,bathroom,storage room,wardrobe,bedroom and so on.Control exhaust fan and hidden lights,wall lamp,night light,spotlights,downlights and so on lighting.