This article suggests that combining natural daylight with artificial lighting in buildings can save energy. Daylight is free, helps people feel better, and improves how buildings perform. The researchers looked at how using natural light alongside electric lights can lower energy use in schools and offices. They found that using a system to control lighting can significantly decrease how much energy is used for lights and in general in buildings. By properly using daylight, buildings can be more energy-efficient and people can be more comfortable and productive.