Luminance

[loo-muh-nuh ns] /ˈlu mə nəns/

noun
1.
the state or quality of being .
2.
Also called luminosity. the quality or condition of radiating or reflecting light:
the blinding luminance of the sun.
3.
Optics. the quantitative measure of brightness of a light source or an illuminated surface, equal to per unit solid angle emitted per unit projected area of the source or surface.
/ˈluːmɪnəns/
noun
1.
a state or quality of radiating or reflecting light
2.
a measure (in candelas per square metre) of the brightness of a point on a surface that is radiating or reflecting light. It is the luminous intensity in a given direction of a small element of surface area divided by the orthogonal projection of this area onto a plane at right angles to the direction L
n.

“luminousness,” 1862, from Latin luminantem (nominative luminans), present participle of luminare (see luminary).
luminance
(l’mə-nəns)
The luminous intensity of a light source per unit area. Occasionally the lambert unit is used to measure luminance. Also called photometric brightness.

brightness

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[loo-muh-ner-ee] /ˈlu məˌnɛr i/ noun, plural luminaries. 1. a celestial body, as the sun or moon. 2. a body, object, etc., that gives light. 3. a person who has attained eminence in his or her field or is an inspiration to others: one of the luminaries in the field of medical science. adjective 4. of, […]
Luminary
[loo-muh-ner-ee] /ˈlu məˌnɛr i/ noun, plural luminaries. 1. a celestial body, as the sun or moon. 2. a body, object, etc., that gives light. 3. a person who has attained eminence in his or her field or is an inspiration to others: one of the luminaries in the field of medical science. adjective 4. of, […]
Luminate
v. 1620s (now obsolete), from Latin luminatus, past participle of luminare (see luminary). Related: Luminated; luminating.

Lumined
[loo-muh-nes] /ˌlu məˈnɛs/ verb (used without object), luminesced, luminescing. 1. to exhibit . /ˌluːmɪˈnɛs/ verb 1. (intransitive) to exhibit luminescence
Luminescence
[loo-muh-nes-uh ns] /ˌlu məˈnɛs əns/ noun 1. the emission of light not caused by incandescence and occurring at a temperature below that of incandescent bodies. 2. the light produced by such an emission. /ˌluːmɪˈnɛsəns/ noun 1. (physics) n. 1884, from Latin lumen (genitive luminis) “light” (see luminous) + -escence. Fluorescence and Phosphorescence — Prof. E. […]