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lampide vahetamises, lampide ja valgustite puhastamises ning ruumi pindade puhastamises seisnevate korraliste tööde vaheline aeg, repetition of lamp replacement, lamp/luminaire cleaning and room surface cleaning intervals
maintenance cycle . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/maintenance%20cycle/1/eng (03.07.2026)
