![]() ![]() It's a little unclear in the LEED Guide, but even a fixture with a direct component will be exempt if it has an indirect component (and it is not possible to see into the indirect component from above). The less the object is visible, the less light it sucks in. Negative 50k Luminance - Whoa NB: The Cutout Opacity ghost light trick doesn't work. Negative 20k Luminance - Getting somewhere. The best way around this is to use direct/indirect lighting or indirect only lighting. Negative 1k Luminance - Not a lot of effect. If anyone does find one, let the forum know! So far, we have not found a direct only fixture that meets this criteria. If any number in that table is greater than 2500 cd/sqm, then the fixture does not comply. This table shows data from 45 to 85 degrees in 10 degree steps. One of these is the Luminance Data table. ies file and it will provide various metrics. In order to find it if it's not on the cut sheet you would need a program similar to Photometric Toolbox. Abstracted a bit, luminance is a measure of "brightness", which is what this strategy is trying to evaluate. That is becuase the characteristic in question is luminance, not illuminance. First, to answer your question about metrics, the correct unit is cd/sqm.
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