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
Félix Candela Félix Candela Félix Candela Outeriño (; January 27, 1910 – December 7, 1997) was a Spanish and Mexican architect who was born in Madrid and at the age of 26, emigrated to Mexico, acquiring double nationality. He is known for his significant role in the development of Mexican architecture and structural engineering. Candela’s major contribution to architecture was the development of thin shells made out of reinforced concrete, popularly known as "cascarones". He was a teacher of Santiago Calatrava, which has had a great influence on Calatrava's works. Felix Candela was born in Madrid, Spain in 1910. In 1927 Candela