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Ho trovato questo:
Technically, lumens measure "luminous flux." A wax candle generates 13 lumens; a 100 watt bulb generates 1,200. The lumen rating is a critical specification when choosing a data projector. In a darkened room, 500 lumens may be ample; however, in a conference room with normal lighting, 1,000 lumens would be better. In a room with bright daylight, 2,000 lumens is preferred
In pratica dice che una lampada da 100w genera circa 1200 ansi lumen.
Ora basta capire quanti ne genera un led ad alta luminosità.
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