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FAQs about MRc4 :

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?

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?

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Forum discussion

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

Initial Inventory

Can someone explain the building inventory? I see here it says to inventory for manufacturer, etc but the LEED online form just asks for a number of mercury-containing bulbs in the building. I'm just still not quite grasping what is meant by the purchasing plan and what needs to actually be tracked. Here's my assumption: number of mercury containing lamps; the types of lamps that would need to be purchased to achieve 90 picogram target; the actual lamps purchased during the performance period. Yes?

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Fri, 08/09/2013 - 21:57

Hi Emily, Most project teams start by inventorying the current lamps in use. You use the same type of format as is shown in the Lamp Purchasing Plan table within the Form. Then, depending on where your current picogram per lumen hr level is, your plan can be to simply continue purchasing identical replacements from your current inventory if you already comply, or you must find lower mercury alternatives for your going forward plan, which is what you report in the LEED Form. I'd recommend using the Lamp Inventory Worksheet that is housed under the LEEDuser Documentation Toolkit for this work.

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