2. 【Energy Efficient by Turning Lights off Automatically】: Led motion sensor light bulbs switch on at night automatically when motion is detected and then turn off in 17 seconds when no motion is detected.(This is normal that the radar sensor light bulb will light up if power is on for the first time during the day, and it will automatically turn off after 17 seconds when no movement is detected.)

3. 【Dusk to Dawn Sensor】Built-in photocell sensor makes motion sensor light bulb automatically turn ON in the dark (<15lux) when motion sensor is activated and turn OFF during the daytime (>40lux) even with motion detected.This bulb lights up only in the dark, to avoid unnecessary work in the daytime or when the ambient light is bright, smarter and more energy saving.

Attention: This light bulb does not work during the day and only works when it detects object movement at night. Please test in a dark environment during testing