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FAQs about MRc2 :

The project building includes a significant amount of process lighting. Do these lamps need to be included?

I can’t find mean lumens on the manufacturer documentation. What should I do?

Do lamps purchased for task lighting need to be included in my calculations?

How should I account for LED purchases? Do I have to show that the LEDs are as energy efficient as similar mercury-containing lamps?

Our building average is over 70 picograms per lumen hour for installed lamps. Do we have to replace lamps before they’ve reached the end of their useful life in order to reach the credit threshold?

Is there a minimum number of lamps that need to be purchased during the performance period in order to achieve this credit?

We purchase lamps for some of our tenants, but not all of them. Can lamps for these tenant spaces be excluded?

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EBOM-v4 MRc2:Purchasing - lamps

Replacing High-mercury lamps in Performance Period before useful life

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LEEDuser Basic Member
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If the overall average of 70 picograms per lumen hour is not satisfied, and the lamps identified to have high mercury content do not complete their useful life before the performance period ends, does that mean that these lamps should still be replaced so that the overall criteria is met to pursue this credit?

I read on this forum that at least one lamp needs to be replaced, but what if with just one lamp, the criteria is still not met? Do we need to replace as many lamps as necessary to meet this credit even if they have not reached their end of useful life yet? 

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Trista Brown
Project Director
WSP USA
LEEDuser Basic Member
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Mon, 02/26/2018 - 19:09

Hi Mini, compliance for this credit is based on the purchases made during the performance period. You'll need to use the USGBC Purchasing Calculator to document that on average, the mercury content of purchased lamps was 70 picograms/lumen-hour or less. You don't have to submit anything related to your installed lamps for this credit, which is a change from EBOM 2009.

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