Motion Sensor Light Bulb Radar Motion Activated LED Bulb Dusk to Dawn E26/E27 Auto On/Off Indoor/Outdoor Movement Detector Night Light for Front Door Hallway Stairs Basement Patio Porch Garage (1pack)

How it works
1) During the daytime, the sensor bulb does not detect any movement and the light is always turned off.
2) During the night, when somebody or any other moving object triggers the sensor which is within 26ft from the bulb, the motion detection lamp will turn on automatically.
3) After the moving objects or people leave, there will be a delay of 20 seconds and the lamp will turn off automatically.
4) Just install the LED motion sensor light bulb like a regular bulb and leave the switch on. You don't need a separate light sensor and no need to change the socket. It can also work when you install it in a lamp fixture. Please remember to keep the bulbs not less than 26ft from each other to avoid the inter-symbol interference between the two bulbs

Troubleshooting Tips:
If the motion detector light bulb automatically lights up and turns itself off every 30 seconds, please check whether there is a person, animal or any other moving objects around the sensor. You can install it in another room to double check if it is working properly.
If it is installed outside and it keeps turning on and off when it is raining heavily or it is windy, we suggest that you switch the light off during this time.
If it doesn't work after you have installed it nearby some street lights or any other dark light, you can reduce the dust to dawn 3 steps:
1.Unscrew the bulb and remove the bulb cup.
2.Shade the dust to dawn sensor component slightly (as shown in picture 4) by using a black marker. 3. Place the bulb cup back and reinstall the bulb.
(Please note that if shade the component completely, the dust to dawn sensor will lose its effect, but will have no influence on the radar motion sensor.)
If it flickers in the cood winter, we suggest you to use it in the room which the temperure is above 0℃/32℉