Natural lighting: natural lighting, also known as daylight. Daylight is always in constant change. If we set it up, we will be able to see how it changes in a given law. And other types of light source characteristics have been developing in the daytime, the same is true of the lamps. In the tens of millions of years of human evolution, the vast majority of time is in the natural light environment, which makes the human nature of the natural light with the inherent adaptability and proximity.