?Infrared Motion Sensor? With sensitive infrared sensor on the top of motion sensor bulb, it will automatically light up when movement is detected within 8-16 feet in the dark, and turn off after motion cease or disappear in about 30-40 seconds. No need to switch on/off physically. Plug and Play! (Tips: 1. Keep the switch on. 2. You can adjust the Angle and Height of the bulb installation, and make the sensor toward the direction people to increase the bulb's sensitivity)

?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