Noun

(wikipedia brightness) (en-noun)

The quality of being bright.

*, chapter=5

, title= The Mirror and the Lamp , passage=Here, in the transept and choir, where the service was being held, one was conscious every moment of an increasing brightness ; colours glowing vividly beneath the circular chandeliers, and the rows of small lights on the choristers' desks flashed and sparkled in front of the boys' faces, deep linen collars, and red neckbands.}}

The perception elicited by the luminance of an object.

Intelligence, cleverness.

Noun

(en noun)

A sudden display of brilliance; a flashing of light, a sparkle.

* 2001, (2001), 6,

All of these things - the rubbed amber, the magnets, the crystal radio, the clock dials with their tireless coruscations - gave me a sense of invisible rays and forces, a sense that beneath the familiar, visible world of colors and appearances there lay a dark, hidden world of mysterious laws and phenomena.