Luminous intensity

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

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.