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oma lampide ja seadistega komplekteeritud valgusti ülemisse poolruumi kiirguva valgusvoo ja valgusti lampide valgusvoogude summa jagatis, ratio of the upward luminous flux of the luminaire, measured under specified practicalconditions with its own lamps and equipment,
ülapoolne talitluskasutegur . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/%C3%BClapoolne%20talitluskasutegur/1/est (11.07.2026)
