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nurk rõhttasandist esimese nägemissuunani, milles valgustis paiknevate lampide valgust andvad osad on otse näha, angle between the horizontal plane and the first line of sight at which the luminous parts of the lamps in the luminaire are directly visible
kaitsenurk . Valgustehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//valgus/kaitsenurk/1/est (03.07.2026)
