Candela frequency and that has a radiant intensity in that direction of watt per steradian. The definition describes how to produce a light source that (by definition) emits one candela, but does not specify the luminosity function for weighting radiation at other frequencies. Such a source could then be used to calibrate instruments designed to measure luminous intensity with reference to a specified luminosity function. An appendix to the SI Brochure makes it clear that the luminosity function is not uniquely specified, but must be selected to fully define the candela. The candela is sometimes still called by the old name
Rosario Candela the apartment buildings. Candela's greatest work would occur during the latter half of the 1920s, when he designed numerous apartment buildings on the Upper East Side, primarily on Fifth Avenue and Park Avenue, as well as at Sutton Place and other locations. In 1927 and 1928, Candela designed 19 apartment buildings, including 960 Fifth Avenue (at East 77th Street) and 720 Park Avenue (at East 70th Street). He had more commissions in 1929, but the housing boom had begun to slow prior to the stock market crash in October. Of 27 designs that year, only 12 were completed. These included