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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

LEDs compared to their counterpart flourescent

Saju Varghese

SUSTAINABILITY COORDINATOR

JALRW Eng. Group Inc.

LEEDuser Basic Member

24 thumbs up

March 4, 2013

In order to compare apples to apples (efficiency) lets assume the unit as lumens/Watt. However, LEDs should be compared to their "most" efficient counterpart, and to their "initial" efficiency since they decay with time? or to the regular counterpart and an average efficiency? Thanks.

Post a reply

Tristan Roberts

Representative

Vermont House of Representatives

LEEDuser Expert

7780 thumbs up

Wed, 07/31/2013 - 16:06

Victor, "efficiacy" is the term for lumens/watt. There are rules about the rated efficacy of LEDs and I would go with that, and not overthink the decay issue.

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