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valgusti antud ajahetke talitluskasuteguri ja alg-talitluskasuteguri jagatis, ratio of the light output ratio of a luminaire at a given time to the initial light output ratio
valgusti hooldetegur . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/valgusti%20hooldetegur/1/est (08.07.2026)
