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valgusallika geomeetrilise kogu-kiirgusvoo Φ 4π sterradiaani spektraaltihedus, spectral concentration of the geometrically-total 4π steradian radiant flux Φ of a light source
total spectral radiant flux . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/total%20spectral%20radiant%20flux/1/eng (09.08.2026)