The led sensor bulbs with auto switch are very convenient in our home life. It will light up automatically while the motion lights bulbs detect motion in the detective range in darkness, and turn off by itself without controlling switch. When get up at midnight, you don t have to turn all lights on and wake others up. Operation Tips: 1. Please turn off power before the installation. 2. Only work with normal switch and should stay by ON position, NOT compatible with switches like sound switches, touch switches or sensor switches, dimmers. 3. Stay away from places where there is direct sunshine, air conditioner, dryer, heater or strong electromagnetic wave, as to avoid interference; 4. The bulb should be installed downward and less height than 9"/3 meters, or the sensor will not work. It automatically runs a 30 seconds test with first installation even if you install it in the daytime. 5. This PIR motion sensor light bulb CAN NOT work through glass or any lamp covers, so the bulb top must be completely exposed. 6. The distance between two sensor bulbs should be more than 9"/3 meters or they will be interfered by each other. 7. If intend to use the auto light bulb for outdoor fixtures, please find a way to protect it from water yet no blocking the sensor parts on the top of bulb. 8. The motion led bulb will turn on only when it detects motion in darkness; Specification: Material: Aluminum + PC Input Power: 100-240VAC, 50/60Hz Output: 600 lumens CRI: >80 Power Consumption: 8.0W Color Temperature: 2700K Warmwhite Base: E26/E27 Sensor Mode: Motion Sensor and Light Sensor Sensor Range: ≤120°, ≤15 feet Sensor Delay Time: 30-45 seconds Bulb Size: A19/A60, Ф2.36" * 4.33" Package Includes: 2 Pack