What device is used for turning lights off when you leave a room?

The device that is used for turning lights off automatically when you leave a room is an occupancy sensor. These sensors are designed to detect the presence of people in a specific area. When the occupancy sensor does not detect any motion for a predetermined period, it signals the lighting system to turn off the lights, thereby enhancing energy efficiency and ensuring that lights are not left on unnecessarily.

Occupancy sensors are particularly useful in spaces where users may frequently forget to turn off lights, such as conference rooms, restrooms, or hallways. By automatically controlling lighting based on occupancy, these devices contribute to significant energy savings and also prolong the lifespan of the lighting fixtures.

The other choices serve different functions. A wireless remote allows users to manually control lights from a distance, but it does not automatically turn off lights. A decorator style refers to the aesthetic design of light fixtures and does not encompass any functionality related to turning off lights. A time clock manages lighting circuits based on a preset schedule, turning lights off at specified times rather than responding to the presence or absence of individuals in a room.