Standard illuminant

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Notion

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Science and technology

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What Wikipedia says

A standard illuminant is a theoretical source of visible light with a spectral power distribution that is published. Standard illuminants provide a basis for comparing images or colors recorded under different lighting.

Excerpt from the Wikipedia article “Standard illuminant”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Ellande, CC0, via Wikimedia Commons.