One of the smart lighting ways to have a smart bulb with no need to the internet (i.e. WIFI), the advance radar detecting technology is more sensitive and more penetrating than infrared sensors. The radar sensor light bulb can detect motion that at the other side of the wall (The thickness of wall should less than 8 inches), therefore it will be switched on when it is detecting any object moving and automatically turning off after no motion for 30-40s. (NOTE: After installing the light bulb, please turn on the wall switch to keep it in power, it will light on in dark.)
 
The smart bulb only light in the dark when detecting motion and stop work at daytime. LED bulb is more power efficient than traditional motion sensor bulbs, greatly helping to cut down your energy charge. This approach increases the bulb service lifetime.

The radar sensor smart bulb is suitable to install in the bedroom, restroom, stairs, hallway, courtyard, entrance door and much more. Provide bright white light and prevent stumbling in the dark