refulgent \rih-FUL-juhnt\ (adjective) - Shining brightly; radiant; brilliant; resplendent.

"For an instant, refulgent in his halo of media lights, the camerlengo looked celestial, like some kind of modern deity." -- Dan Brown, 'Angels and Demons'

Refulgent comes from the present participle of Latin refulgere, "to flash back, to shine brightly," from re-, "back" + fulgere, "to shine."