Forum discussion
EBOM-2009 MRc4: Sustainable Purchasing—Reduced Mercury in Lamps
Hi I was wondering what you are supposed to do if the manufacturer spec sheet has the number for picograms of mercury per mean lumen hour, but not the number for the amount of mercury content.
I ask this mainly in relation to what is required to input for LEEDonline.
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11477 thumbs up
July 12, 2010 - 9:13 pm
Richard the mercury content per bulb is a required input for LEED Online. The way the form is set up, it calculates the building average picograms/lumen-hr within the form, so this can't be an input. I would try to get this information from the manufacturer.
Bill Swanson
Sr. Electrical EngineerIntegrated Design Solutions
LEEDuser Expert
734 thumbs up
November 11, 2010 - 8:09 am
Look at the mean lumen output and the average lamp life in hours (based on 3-hour starts). As an example:
32W T8 lamp
Mercury: 83 picograms Hg per mean lumen hour
Mean Lumen: 2,385 lumen
Lamp life @ 3h: 20,000 hours
Total mercury = (0.000000000083) * (2,385) * (20,000)
Total mercury = 0.00396 g of mercury, Or 4.0 mg if you short hand it.