fulgency

plural fulgencies

1. obsoleteuncountableusuallybrightness; splendour; glitter; effulgence

   Besides, that from its fulgency it appears like flame.

   1787, Tobias George Smollett, The Critical Review, Or, Annals of Literature, volume 63

   2 more examples

   Still but a shadow of his fulgency, His splendour shaded in that shrine of light;

   1825, Joseph Belcher, Poetical Sketches of Biblical Subjects

   Let the fulgency of the integrity of American constitutional interpretation remain undiminished and untarnished.

   1937, Law Notes, volume 41