. . . “A New Look at Commercial Ambient LED Lighting” is the title of a 4/4/13 “Posting” from the LED (solid-state lighting) people at the U.S. Department of Energy. THIS IS A MUST-READ!
A couple of slices:
But the evaluators identified a number of areas of concern, one being color consistency. The color of the LED troffers varied from manufacturer to manufacturer, even though most were claimed to be 4000K white. This means that architectural projects with multiple luminaire types in a single room could end up with the downlights looking “greener” than the troffers or task lights, for example.
AND
Another issue noted by the study involved LED T8 replacement lamps. Because they emit no light from their back sides, they changed the appearance of troffers (both lensed and parabolic) by increasing the luminance contrast between the lamp and the unlighted reflector behind it – which, when used with an omnidirectional fluorescent tube, would reflect back plenty of light. The result was apparent stripes on troffer lenses, as well as greater perceived lamp brightness in the parabolic louvers.
NOTE THAT THESE ARE PROBLEMS CITED. The “Posting” also listed positives.
Source: http://electricalcontractor.com/?p=9272
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