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

Purchasing fluorescent UV lamps for HVAC system

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Janki Vyas
Sustainability Consultant + Architect
Re:Vision Architecture
LEEDuser Basic Member
0 thumbs up

Our office has to purchase replacement UV lamps for our air filtration system. The manufacturer recommended lamps are fluorescent and contain a low level of Hg (3 Mg). So my question is, would we have to include these lamps in our purchasing plan? They are not being used to light a space, the main purpose of these lamps is to disinfect air filters. If the UV lamps need to be included, I was able to get the Hg content from the manufacturer and the lamp life (it's recommended to replace the lamps every 2 years) but I can't find anything on lumen output. How would one go about calculating the picogram per lumen if there is no lumen value available?

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Bill Swanson
Sr. Electrical Engineer
Integrated Design Solutions
LEEDuser Expert
516 thumbs up

Fri, 03/08/2013 - 18:29

I can see the arguement both ways for this. It's a grey area. UV light is still light and can fit the intent of this Credit's scope. But it's also integral to a piece of equipment that serves a function other than lighting. No one is asking for mercury content in other lighting integral to equipment like the light in your refrigerator or microwave. I'd say use your own opinion and you can find justification either way if challenged.

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