luminance

https://doi.org/10.1351/goldbook.L03640
Photometric counterpart of radiance, producing the visual sensation called brightness. Typical units are: candela m−2 (nit), candela cm−2 (stilb), foot lambert (2.426 nit). As with all photometric quantities, luminance does not refer to a specific wavelength, but applies to light emitted by a standard source (formerly a 'standard international candle', now a blackbody radiator emitting at the temperature of solidifying platinum, 2042 K). Conversion from photometric units to radiometric units (e.g. J s−1) requires convolution over wavelength of the relative spectral response of the human eye (photopic response tables).
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2199 [Terms] [Paper]
Citation: 'luminance' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.L03640 RIS BibTex EndNote
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