The photosynthesis of the tropical rainforest plant in the exhibition area with weak artificialillumination in Shanghai Science & Technology Museum was studied.
Artificialillumination on a Kuiper Belt Object would stand out because it would vary less than reflected sunlight does when the world moved toward or away from the sun.
The LED white light has also let manpower simulate natural brightness, it has made up natural light selecting and artificial lighting this two kinds illumination deficiency.