What is the difference between natural lighting and artificial lighting? (two)

After the test of the energy crisis, it was found that natural light is inexhaustible, clean energy, which is in many ways artificial light can not be replaced. The environmental value of natural lighting has been paid more and more attention. For lighting designers, in the design of the building and the environment lighting, do not evaluate the natural lighting and its relationship with the building interior, shape and color is impossible. In order to do so, it is necessary to understand the adverse effects of the orientation of the building and the environment, the external occlusion, the climate and the glare to eliminate it.