This revolutionary product from Symple Stuff combines the efficient light output of a 12w LED equivalent to a 75w incandescent lamp with a built-in movement motion sensor. Why have your low energy lighting or any lighting switched on at all if there is nobody in the room? The 12W E27 LED Light Bulb will turn on automatically when motion is detected and remain on until it detects no movement for 30 seconds. It has a long detection range of 5 meters and will always stay on whilst there is movement in range.