Motion activated outdoor lighting has a shock value to would-be intruders. When suddenly flooded with light, an intruder (who thought he would be able to stay in the dark) is not going to want to wait around. It’s just common sense to expect the burglar to move on to a dark, less protected target. Some insurance companies may even offer premium incentives for homeowners with this type of security lighting.
In addition to protecting your property from criminals, motion activated lighting can add significant convenience. When returning home after dark or going outside at night, well-placed motion sensor floodlights can illuminate the driveway, entryways and other walkways around your home. Also, some motion lights have special settings that will only enable lighting operations during darkness, using a photocell to detect whether the ambient light is dark enough to enable lighting operation. In addition, some motion lights provide further convenience with settings such as Dual Brite settings, which will provide a convenient lower level of lighting during the time right after dusk, but still operating at full power mode when motion is detected.
The motion sensor is sensitive to both motion and the amount of infrared energy that it is sensing. The electronics are designed to detect rapid changes in the amount of energy (heat) that passes by the sensor area. This is why a motion light will be triggered by a person or animal moving in the sensor area.
Motion sensors are also used indoors, and provide convenient lighting to a room or area of your home when motion in the room is sensed. The way they work is fairly simple and straightforward. These are typically line-of-sight systems, and detect movement of objects based on the changes in energy/heat. These types of indoor motion sensors are frequently used in laundry rooms, closets, stairwells and other rooms where automatic lighting would help.