#luminosity__brightness__brightness_level__luminance__luminousness__light  the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun"
  supertype:  #physical_property  a property used to characterize physical objects
  subtype:  #illuminance__illumination  the luminous flux incident on a unit area
  subtype:  #incandescence  light from heat
  subtype:  #luminescence.luminosity__glow  light from nonthermal sources

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