noun

brilliancy

BRIL-yun-see/ˈbrɪljənsi/

Exceptional brightness or vividness.

The device's brilliancy floods the room with intense light.

A young inventor demonstrates a small device that floods the room with intense light while the surrounding experts lean in with impressed expressions at its elegant construction.
Etymology

Brilliancy names the quality of being brilliant. The image of sparkling light extends to exceptional intelligence or excellence, treating outstanding qualities as a kind of brightness.

In context

Talks at Google8:21
These are filaments, and they are unequal in brilliancy."
Genuine Fakes: How Phony Things Teach Us About Real Stuff | Lydia Pyne | Talks at Google
Numberphile0:38
brilliancy award for his solution. My solution involved induction and a cubic polynomial.
The Notorious Question Six (cracked by Induction) - Numberphile

More examples

  • Years of sunlight have reduced the brilliancy of the fabric's colors.
  • Her brilliancy is evident in how quickly she grasps complex ideas.
  • The grandmaster's latest brilliancy secures an unexpected victory.

Forms

brilliancy

brilliant adjective — Shining brightly or showing vivid colors.

brilliance noun — Striking brightness or richness of color.

Similar words

brightness
Describes light intensity without necessarily suggesting anything striking.
vividness
Emphasizes strong, clear colors rather than emitted light.
radiance
Suggests light shining outward rather than vivid color alone.