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pinnale langeva valgusvoo pindtihedus, величина светового потока, падающего на единицу поверхности, измеряется в люксах, the energy in the form of visible radiation reaching a surface per unit area in unit time
Beleuchtungsstärke . Limnoloogia sõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//lim/Beleuchtungsst%C3%A4rke/1/deu (20.06.2026)