Lighting a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m). The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m. The amount of useful light emitted from a source or the luminous flux is measured in lumen (lm). The SI unit of illuminance and luminous emittance, being the luminous power per area, is measured in Lux. It is used in photometry as a measure of the intensity, as perceived by the human eye, of light that hits or passes
Measure of America Measure of America Measure of America is a non-partisan, non-profit initiative of the Social Science Research Council in Brooklyn, New York. It conducts research and analysis primarily on human development data from the United States at the national, state, and county levels. Measure of America aims to stimulate fact-based dialogue about human development issues in the United States by “[breathing] life into numbers, [and] using data to create compelling narratives that foster greater understanding of our shared challenges and greater support for people-centered policies.” Measure of America’s seminal work is the American Human Development Index. Its U.S. specific index is