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
RepresentativeVermont House of Representatives
LEEDuser Expert
11474 thumbs up
September 30, 2014 - 6:51 pm
Karim, they would be counted as having zero mercury content.
Charalampos Giannikopoulos
Senior Sustainability ConsultantDCarbon
84 thumbs up
July 29, 2015 - 4:55 pm
And how can we prove that the energy efficiency levels of LED are equal to or greater than those of comparable mercury-containing lamps?
Kimberly Schlaepfer
Sustainability Coordinator LEED AP O+M, BD+C74 thumbs up
August 28, 2015 - 1:08 pm
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.
Brian Salazar
President, LEED AP, WELL APEntegra Development & Investment, LLC
56 thumbs up
November 3, 2017 - 4:40 pm
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.
Robert Fernandez
Founder and CEOGreenwave Global Consulting (GGC)
8 thumbs up
February 22, 2018 - 4:07 pm
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