SENSITIVE PIR MOTION SENSORAdopts high-sensitive PIR infrared sensor with 120&deg. detection angle at the tip of bulb to detect motion within 20ft in the dusk. And once it is detecting motion,it will automatically turn on about 60 seconds.(NotePlease install the bulb with the sensor tip downward and at the height of 10-13ft to make sure a sensitive sensor.) ENERGY SAVING DUSK TO DOWN BULBBuilt-in dusk to down sensor,our bulb integrates with light sensor,and when it is detecting motion and the environment light is below about 30 Lux,it will automatically turn on and lasts up to 60 seconds,and,it will automatically turn off when the environment light is below about 30 Lux,saving energy and electricity cost. SUPER BRIGHT LIGHT PERFORMANCEBuilt-in high-efficiency,and low light wane 5730 LED chips,just 5W is equivalent to 30W traditional light bulb,providing 600lm(6500k color temperature) and 9W is equivalent to 80W,providing 1000lm and 6500k color temperature,saving 90% energy. Our bulb is power-saving,same enjoyment,sharply decrease your electricity costs. PLUG AND PLAYComing with standard E27 bulb base to snugly fit E27 bulb socket,plug and play,no wires or light fixtures needed. WIDE APPLICATIONOffering optimal lighting effect in stairs,hallway,bathroom,front door,storage room,garage,closet,balcony,gate or any other places.