Luminosity

n.

1.

The quality or state of being luminous; luminousness.

Noun

1.

luminosity - the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" Synonyms: brightness level, luminance, luminousness, brightness, light

bright, brightness, brightness level, dull, glow, illuminance, illumination, incandescence, light, luminance, luminescence, luminousness, physical property