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QUDT VOCAB Quantity Kinds Release 2.1.25
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quantitykind:Illuminance
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http://qudt.org/vocab/quantitykind/Illuminance
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Illuminance
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http://dbpedia.org/resource/Illuminance
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http://en.wikipedia.org/wiki/Illuminance
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\(E_v = \frac{d\Phi}{dA}\), where \(d\Phi\) is the luminous flux incident on an element of the surface with area \(dA\).
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Illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, wavelength-weighted by the luminosity function to correlate with human brightness perception.