ILLUMINANCE

Illuminance

In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface, wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance.

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illuminance

Noun

  1. The luminous flux incident on unit area of a surface; measured in lux or lumens


The above text is a snippet from Wiktionary: illuminance
and as such is available under the Creative Commons Attribution/Share-Alike License.

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