radiance

1 the quality or state of having or giving off light the radiance of the midday sun created a harsh glare for the skiers Synonyms brightness, brilliancy, candor, dazzle, effulgence, illumination, lambency, lightness, luminance, luminosity, luminousness, luster (or lustre), lustrousness, brilliance, refulgence, splendorRelated Words blaze, flare, flash, flicker, light; fluorescence, incandescence, luminescence; burnish, gloss, polish, sheen, shine, shininess; fire, flame, glare, glow; flash, gleam, glimmer, glint, glisten, glitter, scintillation, shimmer, sparkle, twinkleNear Antonyms dimness, gloominess, somberness; cloudiness, haziness, murkiness, obscureness, obscurity; colorlessness, grayness, lackluster, paleness, shadiness, shadowinessAntonyms blackness, dark, darkness, dullness (also dulness), duskiness

2 the steady giving off of the form of radiation that makes vision possible had a dream in which she was steadily moving down a dark tunnel toward a radiance at the far end Synonyms blaze, flare, fluorescence, glare, gleam, glow, illumination, incandescence, luminescence, light, shineRelated Words flash, glimmer, glint, glitter, scintillation, shimmer, sparkle, twinkle; daylight, moonlight, sunlight, sunshine; afterglow, aureole (or aureola), aurora, beam, halo, ray, shaft, streak, stream, sunbeam; glisten, gloss, luster (or lustre), polish, reflection, sheenNear Antonyms blackness, dark, darkness, dimness, dusk, duskiness, gloom, night, shadow