I.
a.
1.
Luminous, shining, resplendent, glowing, lustrous, beaming, gleaming, glittering, glistening, glistering, twinkling, beaming, shimmering, sparkling, scintillating, scintillant, coruscating, flashing, flaming, blazing, dazzling, irradiant, radiant, brilliant, effulgent, refulgent, splendid, luminiferous, luciferous, light, vivid, nitid, sheeny, glossy, burnished, sunny, orient, noon-day, meridian, noontide, fulgid, fulgent, beamy, silvery, argent.
2.
Clear, transparent, lucid, pellucid, lucent, lambent, cloudless, untroubled, limpid.
3.
Illustrious, glorious, famous.
4.
5.
Auspicious, cheering, promising, propitious, encouraging, favorable, enlivening, inspiriting, exhilarating, inspiring.
6.
Merry, lively, cheerful, cheery, happy, sprightly, genial, smiling, pleasant, animated, vivacious.
II.
n.
Brightness, light, splendor, effulgence, sheen, radiance, lustre, luminosity, luminousness.