Effulgence

 WORD OF THE DAY

effulgence / noun / ih-FULL-junss

Definition
1: radiant splendor
2: brilliance

Examples
"His oil portrait silently observed us. His brother Robert who painted it didn't go for the obvious choice and recreate Dad's life-of-the-party effulgence, but instead captured his pensive look, as if he's listening intensely to what you are asking, and he may or may not answer you."
— Jamie Brickhouse, The Huffington Post, 21 June 2022

Just ask Meghan Markle, the Duchess of Sussex who took her lit-from-within skin to the next level yesterday with an ample swirl of roseate blush applied to transform her pregnancy glow into a full-on display of effulgence.
— Calin Van Paris, Vogue, 30 Oct. 2018

Did You Know?
Apparently, English speakers first took a shine to effulgence in the 17th century; that's when the word was first used in print in our language.
Effulgence derives from the Latin verb fulgēre, which means "to shine."
Fulgēre is also the root of fulgent, a synonym of radiant that English speakers have used since the 15th century. 
Another related word, refulgence, is about 30 years older than effulgence.
Refulgence carries a meaning similar to effulgence but sometimes goes further by implying reflectivity, as in "the refulgence of the knight's gleaming armor."