Automatically turn outdoor lights on when they detect motion and then off shortly after. They are most useful for outdoor security and utility lighting. Since they are only needed when it’s dark outside these are often used in combination with a photo sensor.
Detect indoor activity within a certain range and automatically turn the lights on when occupants enter a room and off when the room is no longer occupied; providing convenience and energy savings.
Prevent lights from turning on during daylight hours. Typically used outdoors, but many LED nightlights have this feature. They offer convenience and energy savings.