brightness level vs luminosity

brightness level and luminosity both are nouns.

Word	Noun	Adjective	Verb	Adverb
brightness level	Yes	No	No	No
luminosity	Yes	No	No	No

As nouns, brightness level and luminosity are synonyms defined as:

brightness level and luminosity: the quality of being luminous; emitting or reflecting light

Other synonyms of brightness level include brightness, light, luminance, luminousness.

brightness level (noun)	luminosity (noun)
the quality of being luminous; emitting or reflecting light	the quality of being luminous; emitting or reflecting light