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Undoubtedly, color plays a significant part in our perception of the world around us. We have often experienced situations where the same object appears differently when illuminated with different light sources, giving the impression that the color of an object is also tied to the light source used. This property of the illuminating light source can be quantized as CRI [Color Rendering Index]. The CRI defines how accurately a sample light source reproduces an illuminated object’s color in comparison to a reference light source of comparable color temperature. Figure 1 shows an example where the same object appears differently when illuminated with light sources of different CRI.
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