What is the purpose of a photo cell in a lighting system?

The purpose of a photo cell in a lighting system is to turn lights on and off based on light levels. This device, often referred to as a photoelectric sensor, detects the amount of ambient light in the environment. When natural light levels decrease, such as at dusk, the photo cell activates the lights to ensure adequate illumination. Conversely, when the natural light increases, like at dawn, the photo cell will deactivate the lights to conserve energy. By automatically managing the operation of lighting based on external light conditions, photo cells enhance convenience and contribute to energy efficiency without the need for manual intervention. This functionality is particularly beneficial in outdoor lighting installations, where consistent and efficient light operation is crucial.