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valgusallika valgustugevuse keskmine väärtus kõigis suundades, mis on võrdne selle valgusallika koguvalgusvoo ja koguruuminurga 4π sr jagatisega, average value of the luminous intensity of the light source in all directions, equal to the quotient of its luminous flux and the solid angle 4π sr
keskmine sfääriline valgustugevus . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/keskmine%20sf%C3%A4%C3%A4riline%20valgustugevus/1/est (14.08.2026)
