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Credit language straight from USGBC
Need to check up on the exact LEED credit language from the LEED Rating System on the fly? LEEDuser includes the verbatim language. Members get:
- Easy access to the official LEED credit language with just a couple of clicks.
- On the jobsite without your bulky LEED Reference Guide? Check up on the credit language details here.
- Credit language content is used by permission of the U.S. Green Building Council.
- Rating System EBOM 2009Existing Building Operations
- Rating System SSSustainable Sites
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Rating System
SSc8Light Pollution Reduction
- SSc1LEED Certified Design and Construction
- SSc2Building Exterior and Hardscape Management Plan
- SSc3Integrated Pest Management, Erosion Control, and Landscape Management
- SSc4Alternative Commuting Transportation
- SSc5Site Development—Protect or Restore Open Habitat
- SSc6Stormwater Quantity Control
- SSc7.1Heat Island Reduction—Nonroof
- SSc7.2Heat Island Reduction—Roof
- SSc8Light Pollution Reduction
EBOM 2009 SSc8: Light Pollution Reduction
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8 Comments
Using option (3) measuring lighting (%) percent
Using Option (3) it states under the LEED - EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. V3 2009 a minimum of 8 measurements at 100 feet spacing between mesuements must be peformed.
Question? We are a large Convention Center and would like to know how many measurements are actually required. Do we do one measurement every 100 feet until the entire perimeter has been completed. Or can we do a (Percent) measurement at certain locations which would be a representation of the total measurements? Please Advise....Thank You Rey
Dan Ackerstein replied Principal, Ackerstein Sustainability, LLC Feb 22 2010
One measurement every 100 feet until the entire perimeter has been completed is the correct approach. Gaps of larger than 100 feet would allow for too large undocumented spaces, or at least that is the concern.
Exterior illumination measurement methodology
When peforming the exterior illumination measurements, do both horizontal and vertical foot-candle measurements need to be taken? Or just one or the other?
Dan Ackerstein replied Principal, Ackerstein Sustainability, LLC Feb 22 2010
One or the other should be sufficient Kevin; in most instances my suspicion is that horizontal foot-candles are the right measurement, but I don't think either method is specifically required by the credit language, nor is it required that you perform both methods of measurement at each measurement point.
Dan Prows replied Feb 22 2010
Sorry for chiming in, but I have a question that is along these lines...should the 100' measurement protocol be used as the standard for measuring light transmittal in an NC (warehouse) project where shading the windows are not an option, but the lighting is so high compared to the clerestory windowsPronounced and sometimes spelled "clear-story," these are vertical, or close-to-vertical, windows high in the wall of a building that bring daylight deeply into the building and, if operable, can help ventilate the space. that very little light will be emitted? Any ideas on how to measure the true affect? LEED does not specify in BD&C.
Dan Prows replied Feb 22 2010
Sorry for chiming in, but I have a question that is along these lines...should the 100' measurement protocol be used as the standard for measuring light transmittal in an NC (warehouse) project where shading the windows are not an option, but the lighting is so high compared to the clerestory windowsPronounced and sometimes spelled "clear-story," these are vertical, or close-to-vertical, windows high in the wall of a building that bring daylight deeply into the building and, if operable, can help ventilate the space. that very little light will be emitted? Any ideas on how to measure the true affect? LEED does not specify in BD&C.
Option 2: 50 Watt fixture or 50 Watt lamp?
Does the option 2 exemption for exterior lighting apply to fixtures with ratings greater than 50 watts but using lamps 50 watts or less? We have a project with unshielded exterior light fixtures, and our first thought was to make sure each lamp is 50 watts or less as an easy way to satisfy the exterior lighting demands of this credit.
Dan Ackerstein replied Principal, Ackerstein Sustainability, LLC Feb 26 2010
I think your interpretation is consistent with the credit intent - the objective is to reduce illumination to the night sky, and reducing wattage certainly does so. Depending how much you reduce wattages, it may be more or less ultimately effective than shieldingShielding is a nontechnical term that describes devices or techniques that are used as part of a luminaire or lamp to limit glare, light trespass, or sky glow., but it does meet the requirements.
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