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Forums >> Revit Building >> Technical Support >> lumens/foot candles
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Joined: Thu, Jun 26, 2014
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Hey,
Can anyone lead me into the right direction for determining foot candles through revit. I go to schedules and quantities and it shows 5200 lumens. I need 70-75 foot candles for each store lighting. It cant be dividing lumens by SF. Not making sense. Any help would be great.
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Bjenk8100 |
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Joined: Tue, May 16, 2006
13079 Posts
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One foot-candle is equal to 10.76 Lumens.
But be aware that typical foot candle measurements are at the use level - not at the source. It varies with the mounting height of the light source.
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Joined: Thu, Jun 26, 2014
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Well Revit gives you the lumen number for each type of unit. So if it says 5200 for a 2'2' Troffer then it probably assumes its at 8-10' high, right?
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Bjenk8100 |
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Joined: Tue, May 16, 2006
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Assume - curse out of U and ME.
Lights are typically catalogged as output at source and that is their lumen output. They publish light output graphs that will show you what the level is at different distances. You have to use that to determine what the output needs to be at the source.
ha...ha... I forgot - we have a filter here and it changed my word to curse....you know what it was though.
Edited on: Wed, Jul 2, 2014 at 3:41:14 PM
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