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Author Topic: School me on lights  (Read 2995 times)

Mark Cadwallader

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Re: School me on lights
« Reply #30 on: January 17, 2018, 10:26:28 am »

The context doesn't matter.  I'm not asking for opinions or recommendations.  Just math and measurable visual perception. 

Thanks for trying to try to help though :)

Seems to me that the 8 deg beam with 60w led has more lumens.   How many lumens does it take for a "noticeable dofference"?

With no disrespect (and a tip of the hat to Ivan Beaver), "it depends."  Whether or not it is noticable is dependent on how much other light is present. The extreme example of the difference (in a pitch black venue) is that five lux is much brighter than zero lux. In other contexts (strong ambient light present), a five lux difference isn't noticable at all.

Hence the requests for more information about the intended deployment of the fixture....
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