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FAQs about MRc4 :

How do you know if a lamp meets the NEMA guidelines, and can therefore be excluded?

The project building includes a significant amount of process lighting (i.e. sports arena lighting or studio lighting). Do these lamps need to be included?

There are no mercury-containing lamps installed in the project building. Can we upload a signed statement from our property manager instead of completing the credit form and documentation?

A large multi-tenant project does not have a uniform lighting standard, therefore there are a number of different types of lamps are installed on the project. How should we go about documenting this credit?

Do we need to provide a purchasing plan if the lamp inventory of currently installed lamps shows that the average mercury content is already below 90 picograms per lumen-hour?

Do lamps for task lighting need to be included in the purchasing plan?

Do mercury-free lamps need to be included in Table MRc4-1 Lamp Purchasing Plan and Table MRc4-2 Performance Period Lamp Purchasing?

All of the outdoor fixtures in the project building are mercury-free. Can we exclude all outdoor fixtures from the purchasing plan?

The project building is a large multi-tenant building and tenants are responsible for their own lamp purchases. Can lamps in tenant spaces be excluded?

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Forum discussion

EBOM-2009 MRc4:Sustainable Purchasing—Reduced Mercury in Lamps

LED lamp documentation

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Erin Holdenried
Sustainability Architect
LEEDuser Basic Member
88 thumbs up

I am working on a project whose majority of fixtures are LED. I am wondering what the LED equivalent to a lamp/blub is when documenting this credit. In this project, each fixture uses a number of LED strips (the number of "strips" varies per fixture). Would one LED "strip" count as one blub for documentation purposes?

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Alexa Stone
ecoPreserve: Building Sustainability
LEEDuser Basic Member
101 thumbs up

Sat, 10/29/2011 - 21:08

I am not sure as to why this is relevant. You don't have to include LEDs in the inventory and LEDs don't contain mercury, so the calculation of picogram per lumen hour per bulb wouldn't apply. Instead you would count them as zero picograms if you are purchasing during the performance period. Does anybody else see this differently?
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Erin Holdenried
Sustainability Architect
LEEDuser Basic Member
88 thumbs up

Wed, 11/02/2011 - 17:51

The building is actually a major renovation project going for Low Mercury Lighting as an ID credit for a LEED NC certification. So there is no performance period. We are documenting all the new lights purchased, which includes the LED fixtures and the existing fixtures (that are mostly exterior pole lamps). We actually just got a response to an inquiry from GBCI stating the each LED "strip" would be considered one bulb.

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