Candela of a single point light source of intensity "I", at a distance "r" and normally incident, this reduces to Candela The candela ( or ; symbol: cd) is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction. Luminous intensity is analogous to radiant intensity, but instead of simply adding up the contributions of every wavelength of light in the source's spectrum, the contribution of each wavelength is weighted by the standard luminosity function (a model of the sensitivity
Rosario Candela as well as social cynosure." Born in Montelepre, Sicily in 1890, Candela immigrated to New York in 1906. He returned to Sicily after his arrival to study there and returned to the US in 1909. His father was Michele Candela, a plasterer, and his mother was Josephine Pizzurro. He gained admission to the Columbia University School of Architecture and graduated in 1915. Keenly aware of his talent, he went so far as to erect a velvet rope around his drafting table to prevent other students from copying his designs. After graduation, Candela worked briefly as a draftsman for the Palermo-born