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Created on LEED Interpretation

ID#

li-10298

Credit NameSSc8 - Light pollution reduction
Credit CategorySustainable sites
International ApplicableYes
Campus ApplicableNo

Rating System

LEED O+M: Existing Buildings

Rating System Version

v3 - LEED 2009

Inquiry

After performing illumination measurement readings, some measurements exceeded the threshold dictated by Option 3, Approach 1: Difference in Illumination levels is 20 percent or less. The uncertainty of the light meter used is over six times the captured light level, which could be a result of the inability of a calibrated meter to obtain accurate readings due to low light levels on the project. Even though some measurements exceed the Option 3 threshold, we feel that the project's low light levels meet the intent of the credit. Can readings that are exceeded by the uncertainty of a calibrated light meter be excluded from Option 3?

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