5550photometersTTen-USVocabulário Colaborativo em Artes e Arquitetura active approved photometersDevices that measure the intensity of light falling on a surface (illuminance), or reflected by a surface (luminance), or emitted by a light source (luminous flux or luminous intensity).

Source: Art & Architecture Thesaurus

 http://vocab.getty.edu/page/aat/300200053

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