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unit of luminous energy equal to a lumen of luminous flux acting for one hour, valgusenergia ühik, mis on võrdne ühe tunni jooksul toimiva valgusvoo kogusega
lumen-hour . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/lumen-hour/1/eng (02.07.2026)
