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NC-v4.1 EQc6:Interior Lighting

Decorative lighting fixtures

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Ellis John Mandia
Senior Lighting Designer
dpa Lighting Consultants
LEEDuser Basic Member
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Are decorative lighting fixtures such as chandeliers, wall sconces, and table lamps, that are within regularly occupied space included in the requirements to comply with luminance of less than 2,500 cd/m2 between 45 and 90 degrees from nadir?


The guide only states these exceptions: "wallwash fixtures properly aimed at walls, as specified by manufacturer’s data, indirect uplighting fixtures, provided there is no view down into these uplights from a regularly occupied space above, and any other specific applications (i.e. adjustable fixtures).

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Tue, 08/09/2022 - 15:50

I believe that the types of decorative fixtures that you mention are required to comply. The problem is that often there are no photometric files (.ies, elumdat) available for these types of fixtures so you cannot calculate the luminance or the UGR for the space. You might have to use a file from a similar fixture, or make an estimate based on your professional expertise, and then state that in a narrative in your LEED online submission. Also, you should consider using the 4.1 version of this credit which is overall easier to comply with. The luminance limit you mention (2500 cd/m2) is from the 4.0 version and is almost impossible to meet (it was a mistake in the original credit language that was never fixed). In the 4.1 version the limit is 7000 cd/m2

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