Luminous intensity

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.

luminous intensity
Common symbols	Iv
SI unit	candela
Other units	candlepower Hefnerkerze
In SI base units	cd
Dimension	${\displaystyle {\mathsf {J}}}$