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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

ID credit for low-mercury lamps

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Sheryl Swartzle
Sustainability Specialist
TLC Engineering Solutions
LEEDuser Premium Member
45 thumbs up

To use this for an ID credit does the average of 90 picograms per lumen hour change to an average of 80 picograms per lumen hour to achieve the point?

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Profile picture for user tlittle
Trista Brown
Project Director
WSP USA
LEEDuser Basic Member
381 thumbs up

Thu, 10/17/2013 - 15:59

Hi Sheryl, lamps purchased during the performance period must have an average mercury content of 70 picograms per lumen-hour (or less) to earn exemplary performance credit.
Default Avatar
Sheryl Swartzle
Sustainability Specialist
TLC Engineering Solutions
LEEDuser Premium Member
45 thumbs up

Thu, 10/17/2013 - 21:42

Thanks for your response. Do you know when it changed to 70 picograms?
Profile picture for user tlittle
Trista Brown
Project Director
WSP USA
LEEDuser Basic Member
381 thumbs up

Fri, 10/18/2013 - 02:43

Looks like it was 80 picograms in EB v2.0 and then changed to 70 picograms in EBOM v2008.
Profile picture for user vavedano
Saju Varghese
SUSTAINABILITY COORDINATOR
JALRW Eng. Group Inc.
LEEDuser Basic Member
24 thumbs up

Wed, 11/13/2013 - 22:01

Under the birdeye's view this comment confuses the concept of 70 picograms/lumen: "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? Yes, you still need to provide a purchasing plan to confirm that you have developed a plan for future lamp purchases that meet the credit requirements. If the project building’s currently installed lamps are already below 90 picograms per lumen-hour, you can just copy over the lamp inventory into the purchasing plan table in the credit form. You can adjust the purchasing plan further to get an even lower average mercury-content if desired" Please clarify.
Profile picture for user rdukelow
Robin Dukelow
Sustainability Consultant; Project Manager
Henderson Engineers and Sustainable Design Consulting, LLC
LEEDuser Basic Member
9 thumbs up

Tue, 08/19/2014 - 18:56

Hello, I am going through a review on this as an ID credit on an NC project now. The Reviewer referenced LEED Interpretation 5500, which "requires that projects comply with an average mercury content limit of 80 pictograms in order to achieve an ID point."

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