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CI-2009 EAc1.1:Optimize Energy Performance—Lighting Power

LEED CI 2004, Credit 1.1 Optimize Energy Performance

When reviewing the CI forms from an older project that were filled out by a consultant, I noticed they had taken 10% credit towards the installed lighting power for occupancy sensor control of lighting in rooms such as restrooms, storage rooms, etc. I have not observed anything in ASHRAE 90.7 indicating credit for lighting controls. Could the consultant have been using Title 24? Can you obtain credit for installed lighting power under credit EAC1.1?

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Dan LeBlanc
Senior Sustainability Manager
YR&G
LEEDuser Basic Member
62 thumbs up

Mon, 10/10/2011 - 21:33

David, EAc1.2 addresses controls so, as has been said in other posts, taking credit under EAc1.1 for controls would be double counting. In any case, for EAc1.1, Lighting Power, the calculation is strictly installed lighting power vs. the allowed lighting power. The 10% power adjustment you mention is from ASHRAE 90.1, Table G3.2 in Appendix G, which provides guidance on creating energy models. Any energy modeling done for LEED-CI would only marginally take this into account, as part of EAc1.3 Optimize Energy, HVAC, where decreased cooling demand would result from the lights being controlled by occupancy sensors not being on, and thus not creating heat. I hope this helps, Dan

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