RADIANCY
radiance, radiancy, shine, effulgence, refulgence, refulgency
(noun) the quality of being bright and sending out rays of light
Source: WordNet® 3.1
Noun
radiancy (countable and uncountable, plural radiancies)
The property of being radiant.
(physics) The amount of energy emitted, flux.
Source: Wiktionary
Ra"di*ance, Ra"di*an*cy, n.
Definition: The quality of being radiant; brilliancy; effulgence; vivid
brightness; as, the radiance of the sun.
Girt with omnipotence, with radiance crowned. Milton.
What radiancy of glory, What light beyond compare ! Neale.
Syn.
– Luster; brilliancy; splendor; glare; glitter.
Source: Webster’s Unabridged Dictionary 1913 Edition