Source : Webster's Revised Unabridged Dictionary (1913)

Effulgence \Ef*ful"gence\, n.
   The state of being effulgent; extreme brilliancy; a flood of
   light; great luster or brightness; splendor.

         The effulgence of his glory abides.      --Milton.

         The bright and the balmy effulgence of morn. --Beattie.

Source : WordNet®

effulgence
     n : the quality of being bright and sending out rays of light
         [syn: {radiance}, {radiancy}, {shine}, {refulgence}, {refulgency}]