the luminous flux in lumens emitted per unit solid angle by a light source, measured in candles.
a measure of the amount of light that a point source radiates in a given direction. It is expressed by the luminous flux leaving the source in that direction per unit of solid angle Iv
The luminous flux per unit solid angle (per steradian), as measured in a given direction relative to a light source. Its unit is the candela. See also luminance.
[loo-muh-nuh s] /ˈlu mə nəs/ adjective 1. radiating or reflecting light; shining; bright. 2. lighted up or illuminated; well-lighted: the luminous ballroom. 3. brilliant intellectually; enlightened or enlightening, as a writer or a writer’s works: a luminous concept; luminous prose. 4. clear; readily intelligible: a concise, luminous report. /ˈluːmɪnəs/ adjective 1. radiating or reflecting light; […]
noun 1. paint containing a phosphor that emits visible light when irradiated with ultraviolet light.
noun, Navigation. 1. the distance at which a certain light, as that of a lighthouse, is visible in clear weather, disregarding interference from obstructions and from the curvature of the earth and depending on the power of the light.
lumirhodopsin lu·mi·rho·dop·sin (lōō’mə-rō-dŏp’sĭn) n. An intermediate formed during the bleaching of rhodopsin by light.