## Wikipedia - Luminanza (fisica) luminance

https://doi.org/10.1351/goldbook.L03640
Photometric counterpart of @R05037@, producing the visual sensation called @BT07337@. Typical units are: $$\text{candela}\ \text{m}^{-2}$$ ($$\mathrm{nit}$$), $$\text{candela}\ \text{cm}^{-2}$$ ($$\mathrm{stilb}$$), $$\mathrm{foot}\ \mathrm{lambert}$$ ($$2.426\ \text{nit}$$). As with all photometric quantities, luminance does not refer to a specific @W06659@, 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, $$2042\ \text{K}$$). Conversion from photometric units to radiometric units (e.g. $$\text{J s}^{-1}$$) requires convolution over @W06659@ 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]