| luminous intensity |
The amount of light flux into a specified solid angle.
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| luminance |
The photometric equivalent of radiance. Luminance is obtained by integrating spectral radiance weighted by luminous efficiency over the visible spectrum. Compare illuminance.
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| luminescence |
Any emission of light at temperatures below that required for incandescence.
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| luminous |
1. In general, pertaining to the emission of visible radiation. 2. In photometry, a modifier used to denote that a given physical quantity, such as luminous emittance, is weighted according to the manner in which the response of the human eye varies with the wavelength of the light.
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| luminophore |
A luminescent substance.
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