effulgence (n.)

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").