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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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Forum discussion

EBOM-v4 MRc2:Purchasing - lamps

LED lamps

Profile picture for user karim.farah_1
Karim Farah
General Manager
Reeds Consult
LEEDuser Premium Member
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The LEED guideline states that “Mercury-free lamps, such as LEDs, can be included in the pictogram per lumen-hour calculations only if their energy efficiency levels are equal to or greater than those of comparable mercury-containing lamps.” Our understanding is that all LEDs have no mercury content, how can the LEDs be included in the pictogram calculations, in order to achieve this credit?

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Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Tue, 09/30/2014 - 22:51

Karim, they would be counted as having zero mercury content.

Wed, 07/29/2015 - 20:55

And how can we prove that the energy efficiency levels of LED are equal to or greater than those of comparable mercury-containing lamps?

Fri, 08/28/2015 - 17:08

There are several ways that this could be done. Below are a few ideas. 1) Find documentation from the manufacturer that speaks to the energy efficiency of the lamp as compared to the alternatives. 2) Show that the LED lamp has replaced a different lamp in the building with a higher wattage 3) Show that the lumens per watt for the LED lamp is lower than the lumens per watt for mercury containing lamp that would be used for the same application.
Profile picture for user bsalazar@entegra-re.com
Brian Salazar
President, LEED AP, WELL AP
Entegra Development & Investment, LLC
LEEDuser Premium Member
43 thumbs up

Fri, 11/03/2017 - 20:40

Hello!  I am confused by the above response.  Wouldn't all LED lamps have lumen/watt higher than non-LED alternatives?  Isn't that the point of using LEDs in the first place, to have the same lighting levels and use less power in the process?   If I were to do a summary calculation of all the LED lamps in the project space, with "0" as the mercury content, why would it matter the lumen-hour equivalent?  Zero divided by anything is still zero...   Sincerely looking for guideance here.  I have a number of projects were the designers do not want to install the "token" flurescent lamp just to pursue this credit.  
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Robert Fernandez
Founder and CEO
Greenwave Global Consulting (GGC)
LEEDuser Basic Member
8 thumbs up

Thu, 02/22/2018 - 21:07

    Hey Brian! The above comment is wrong. Think about it. You don't want a lower luman per watt, thats less efficient. A higher Luman per watt means you get more light for less wattage or power!  She must of incorrectly typed ;)... Believe me Ive included this on multiple EBOM projects...You want a HIGHER Luman per watt.  Keep the LED's!! get rid of the fluorescents. -Rob  

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