radiance (suomeksi)

loiste (s)
kirkkaus (s)
säteily (s: the quality of being radiant, shining, bright or splendid)
säteilevyys (s: the quality of being radiant, shining, bright or splendid)
radianssi (s: the flux of radiation emitted per unit solid angle in a given direction by a unit area of a source)
säteilytiheys (s: the flux of radiation emitted per unit solid angle in a given direction by a unit area of a source)