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minimaalne ajavahemik, mille jooksul on täidetud hädavalgustussüsteemi valgustusnõuded, minimum period of time for which the luminous requirements of the emergency lighting system are met
süsteemi kestus . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/s%C3%BCsteemi%20kestus/1/est (15.07.2026)
