Sensor lighting refers to lighting systems that incorporate sensors to detect the presence or absence of individuals or changes in the surrounding environment. These sensors can include motion sensors, occupancy sensors, or light sensors. When activated by motion or low light conditions, the sensors trigger the lighting fixtures to turn on or adjust their brightness accordingly. Sensor lighting is an energy-efficient solution as it ensures that lights are only activated when needed, reducing unnecessary energy consumption. It is commonly used in outdoor lighting, security lighting, and areas where occupancy or motion detection is important, such as stairwells, corridors, or restrooms.