SODIAL(R) E27 25 LED 3528 SMD White Light Lamp Infrared PIR Motion Sensor Detector 5W Brand new and high quality This bulb has a photosensitive internal switch that only allows the light to be activated on when the ambient light is low or dark. At this time this light will turn on automatically if the infrared detector or sound detecter detects changes in its patter, such as when someone walks into its area of Great for use in wardrobes, kitchens, stairs, cupboards, etc.