The special relationship between color rendering and color temperature

The special relationship between color rendering and color temperature

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u003cbru003e Is color rendering related to color temperature?

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u003cbru003e In the process of our lighting work, there are many supporters of the two schools that believe that high color temperature is better and low color temperature is better.

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u003cbru003e People who support high color temperature and good color rendering will take the sunlight at noon as an example, 6000K, good color rendering, it can be inferred that high color temperature is good; people who support low color temperature good color rendering will use The halogen lamp is an example, (3000K) has good color rendering, from which it is inferred that the color rendering at low color temperature is better.

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u003cbru003e Actually, this is a wrong inference. We cannot infer that a four-legged animal eats grass just because a sheep eats grass, nor can a four-legged animal eat meat because a lion eats meat. Color rendering and color temperature It’s the same as whether an animal has four feet or whether it’s eating grass. In fact, the problem lies in the contradiction between our expressive and physical interpretation of light.

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u003cbru003e When paying attention to color rendering and color temperature, what do we pay attention to?

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u003cbru003e Street light

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u003cbru003e Color rendering and color temperature are purely physical indicators, data parameters that scientists try to express their perception. But in fact, our evaluation of the light environment is actually a feeling, or more accurately, an experience process transmitted to the brain through the naked eye. Between the two is the difference between our human eyes’ senses and our ability to express colors on a fixed hard indicator.

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u003cbru003e Our human brain has the function of automatically correcting the information transmitted by the eyes (commonly known as brain supplement). For example, here, it is a white wall and illuminated by a 3000K light source. You will not think it is very yellow, but you will think it is very white. Comfortable, but if there is a 6000K lamp in the room, you will feel that the wall is not white enough, but a little yellow.

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u003cbru003e So, this is the gap between our human feelings and standard physical quantities. These two are things of different measurement systems and cannot be compared together.

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u003cbru003e Introduce the concept of 'sensory color rendering'

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u003cbru003e Street light

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u003cbru003e Therefore, color rendering actually expresses the ability of a light source to express the color of an object, or the ability to distinguish.

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u003cbru003e Take red as an example. For the same color rendering lamp, you will feel less red and lighter under high color temperature, but at low color temperature, you will think it is very red and beautiful. So, do we still An indicator should be introduced, called 'sensory color rendering,' but this indicator is similar to the 'aesthetic index'. It is not something that any of us have the ability to make simple judgments, or to label it with a numerical system.

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u003cbru003e Pay attention to people’s feelings, everything comes from the spectral distribution

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u003cbru003e Street light

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u003cbru003e This question seems to have not been answered clearly, but as long as we grasp the essence of things, we naturally have the ability to infer. Although there is no correlation between color rendering and color temperature, the evaluation of the light environment involving the two is actually based on the distribution of the spectrum, so there is a basic theory, not without rules.

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u003cbru003e In fact, there have been studies on this kind of system. For example, through a large number of population studies, when the color temperature is low, a light color with a lower color coordinate (that is, the light color is reddish) is needed, and people think this It is true 'white light'. We can measure the spectral distribution of this performance with a spectrometer. After we have mastered the data and the principles behind it, we can naturally achieve accurate color matching.