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Light concept and its significance

Vision caused by light stimulation is the main channel for normal people to understand the external situation, so proper lighting is extremely important for daily life.

Human subjective vision forms concepts such as brightness and color. Although these concepts can be used to make qualitative comparisons of different light sources or lighting, they alone cannot meet technical requirements. Therefore, it is necessary to adopt some concepts based on the objective physical properties of light and can be measured by instruments.

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