refulgency

from WordNet (r) 3.0 (2006)

refulgency
    n 1: the quality of being bright and sending out rays of light
         [syn: {radiance}, {radiancy}, {shine}, {effulgence},
         {refulgence}, {refulgency}]

from The Collaborative International Dictionary of English v.0.48

Refulgence \Re*ful"gence\ (r?*f?l"jens), Refulgency
\Re*ful"gen*cy\ (-jen*s?), n. [L. refulgentia. See {Refulgent}.]
   The quality of being refulgent; brilliancy; splender;
   radiance.
   [1913 Webster]