Features: *SENSITIVE PIR MOTION SENSOR:Adopts high-sensitive PIR infrared sensor with 120° 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.(Note:Please 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 BULB:Built-in dusk to down sensor,our bulb integrates with light sensor,and when it is detecting motion and the environment light is below about 30Lux,it will automatically turn on and lasts up to 60 seconds,and,it will automatically turn off when the environment light is below about 30Lux,saving energy and electricity cost. *SUPER BRIGHT LIGHT PERFORMANCE:Built-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.