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Luminance vs Luminosity - What's the difference?

luminance | luminosity |

As nouns the difference between luminance and luminosity

is that luminance is the quality of being luminous while luminosity is (uncountable) the state of being luminous, or a luminous object; brilliance or radiance.

luminance

English

Noun

(wikipedia luminance) (-)
  • the quality of being luminous
  • the luminous flux emitted in a given direction divided by the product of the projected area of the source element perpendicular to the direction and the solid angle containing that direction, i.e. luminous intensity divided by unit area; measured in stilbs or apostilbs

    • Synonyms

    *photometric brightness

    See also

    *brightness

    luminosity

    English

    Noun

    (wikipedia luminosity) (luminosities)
  • (uncountable) the state of being luminous, or a luminous object; brilliance or radiance
  • (physics) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor
  • (astronomy) the rate at which a star radiates energy in all directions