https://doi.org/10.1351/goldbook.L03640
Photometric counterpart of
radiance
, producing the visual sensation called
brightness
. Typical units are: candela m2 (nit), candela cm2 (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 s1) 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]