1. Lasting Energy Saving. LED bulb lasts 10x longer than incandescent and 4x longer than halogen bulbs, saving you the cost of frequent bulb replacement. 100W equivalent to 20W traditional light bulb, providing 1400 lm saving 88% energy, the same enjoyment, sharply decrease your electricity costs. Bulbs are compatible with any standard screw socket and recommended for Indoor use. 2. A19 PREMIUM Quality: 20W (100 Watt equivalent) motion sensor lights bulbs features high quality LED beads with up to 35,000 hours lifespan. 1400lm brightness provides superior illumination to help you see better in the dark and is perfect as a security lights motion bulbs. 3. Intelligent PIR Infrared Motion Sensor. PIR infrared motion sensor is at the top of the bulb, the motion detector works like a small electronic eye that detects infrared waves—heat waves that radiate from moving objects. The LED light bulb turns on automatically once movement is detected within 16ft. It shuts off 30s later after no activity in the detecting scope. 4. You Will Get: 2x A21 motion sensing led bulb.