ID credit for low-mercury lamps

Hi Sheryl, lamps purchased during the performance period must have an average mercury content of 70 picograms per lumen-hour (or less) to earn exemplary performance credit.

Looks like it was 80 picograms in EB v2.0 and then changed to 70 picograms in EBOM v2008.

Under the birdeye's view this comment confuses the concept of 70 picograms/lumen:

"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?

Yes, you still need to provide a purchasing plan to confirm that you have developed a plan for future lamp purchases that meet the credit requirements. If the project building’s currently installed lamps are already below 90 picograms per lumen-hour, you can just copy over the lamp inventory into the purchasing plan table in the credit form. You can adjust the purchasing plan further to get an even lower average mercury-content if desired"

Please clarify.

Hello, I am going through a review on this as an ID credit on an NC project now. The Reviewer referenced LEED Interpretation 5500, which "requires that projects comply with an average mercury content limit of 80 pictograms in order to achieve an ID point."