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