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NC-v4 SSc6:Light pollution reduction

Exemptions

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Heather Holdridge
Sustainability Director
Lake|Flato Architects
LEEDuser Basic Member
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I am working on a project with exterior fixtures that are not illuminating a building facade but more artwork/ sculptural landscape screenwork. I see that there are exemptions for lighting for theatrical purposes for stage, film, and video performances, but not artwork specifically. Has anyone had experience with applying artwork for an exemption? A little more background info in case it is instructive: The fixtures are mounted to the sunscreens and not the building proper. The fixtures are 8.5 watts per foot placing us over the 5 watts per linear foot requirement for building lighting. Thanks!

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colleen soden
Soden Sustainability Consulting
LEEDuser Premium Member
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Tue, 06/01/2021 - 16:50

Heather- Did you get a response on this?
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Bill Swanson
Sr. Electrical Engineer
Integrated Design Solutions
LEEDuser Expert
516 thumbs up

Tue, 06/01/2021 - 17:54

All of the old responses got deleted when they switch servers.

My response from May 18, 2016 was: I've been waiting for someone else to respond. I don't personally have experience with lighting artwork/sculptural landscape screenwork on a LEED project. You might be able to exempt the wattage via ASHRAE 90.1-2010 compliance. But I don't think the performances exemption applies.
Exempt items:
h. Theme elements in theme/amusement parks.
i. Lighting used to highlight features of public monuments and registered historic landmark structures or buildings. Are you using LZ4? This is intended for very rare locations. (California doesn't have any LZ4 in the whole state. Think Vegas strip and Times Square) You may get challenged in your submittal on this lighting zone designation. LZ4 has a base site allowance of 1,300W that can be used on anything. If you have 8.5 W/ft with an allowed 5W/ft. The difference is 3.5W/ft. That is 371 linear feet if you use the entire 1,300W base. (157 ft if in LZ3) Are you using the exemption for separately controlled façade and landscape lighting that is off between 12-6am?

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