the location of a visual perception along a continuum from black to white | the quality of shining with a bright reflected light |
the quality of being luminous; emitting or reflecting light | the twinkling of the stars caused when changes in the density of the earth's atmosphere produce uneven refraction of starlight |
intelligence as manifested in being quick and witty | a brilliant display of wit |
| a rapid change in brightness; a brief spark or flash |
| (physics) a flash of light that is produced in a phosphor when it absorbs a photon or ionizing particle |