What is the term for the reduced operation of luminaires near windows when the sun is shining?

The term that describes the reduced operation of luminaires near windows when the sun is shining is "daylight harvesting." This concept involves using natural sunlight to illuminate indoor spaces, which can significantly reduce the need for artificial lighting during daylight hours. By integrating or adjusting the output of electric lighting based on the amount of natural light available, systems can enhance energy efficiency and improve occupant comfort.

Daylight harvesting systems typically use sensors to measure light levels and then dim or turn off electric lights in response to the increasing presence of sunlight. This practice not only conserves energy but also promotes a healthier environment by maximizing the use of natural light.

Natural lighting refers more broadly to the illumination produced by the sun, regardless of artificial light adjustments, and electric dimming specifically focuses on the reduction of artificial lighting levels without relating to natural light conditions. Solar reduction does not accurately capture the concept of adjusting electric lights based on sunlight; it might imply merely minimizing sunlight entering a space. Thus, daylight harvesting is the most precise term for this scenario.