Illuminance

[ih-loo-muh-nuh ns] /ɪˈlu mə nəns/

noun, Optics.
1.
(def 6).
/ɪˈluːmɪnəns/
noun
1.
the luminous flux incident on unit area of a surface. It is measured in lux Ev Sometimes called illumination Compare irradiance
illuminance
(ĭ-l’mə-nəns)
The luminous flux per unit area at any point on a surface exposed to incident light. It is measured in luxes. Also called illumination.

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Illuminant
[ih-loo-muh-nuh nt] /ɪˈlu mə nənt/ noun 1. an agent or material. /ɪˈluːmɪnənt/ noun 1. something that provides or gives off light adjective 2. giving off light; illuminating
Illuminate
[verb ih-loo-muh-neyt; adjective, noun ih-loo-muh-nit, -neyt] /verb ɪˈlu məˌneɪt; adjective, noun ɪˈlu mə nɪt, -ˌneɪt/ verb (used with object), illuminated, illuminating. 1. to supply or brighten with light; light up. 2. to make lucid or clear; throw light on (a subject). 3. to decorate with lights, as in celebration. 4. to enlighten, as with knowledge. […]
Illuminated
[verb ih-loo-muh-neyt; adjective, noun ih-loo-muh-nit, -neyt] /verb ɪˈlu məˌneɪt; adjective, noun ɪˈlu mə nɪt, -ˌneɪt/ verb (used with object), illuminated, illuminating. 1. to supply or brighten with light; light up. 2. to make lucid or clear; throw light on (a subject). 3. to decorate with lights, as in celebration. 4. to enlighten, as with knowledge. […]

Illuminates
[verb ih-loo-muh-neyt; adjective, noun ih-loo-muh-nit, -neyt] /verb ɪˈlu məˌneɪt; adjective, noun ɪˈlu mə nɪt, -ˌneɪt/ verb (used with object), illuminated, illuminating. 1. to supply or brighten with light; light up. 2. to make lucid or clear; throw light on (a subject). 3. to decorate with lights, as in celebration. 4. to enlighten, as with knowledge. […]
Illuminating
[ih-loo-muh-ney-ting] /ɪˈlu məˌneɪ tɪŋ/ adjective 1. giving or casting light. 2. informative; enlightening. [verb ih-loo-muh-neyt; adjective, noun ih-loo-muh-nit, -neyt] /verb ɪˈlu məˌneɪt; adjective, noun ɪˈlu mə nɪt, -ˌneɪt/ verb (used with object), illuminated, illuminating. 1. to supply or brighten with light; light up. 2. to make lucid or clear; throw light on (a subject). 3. […]