effulgence (n.) Look up effulgence at Dictionary.com
1660s (Milton), from Late Latin effulgentia, from Latin effulgentem (nominative effulgens), present participle of effulgere "to shine out, gleam forth," from assimilated form of ex "out" (see ex-) + fulgere (from PIE *bhleg- "to shine, flash," from root *bhel- (1) "to shine, flash, burn;" see bleach (v.)).