Light pollution reduction | U.S. Green Building Council
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LEED O+M: Existing Buildings | v4 - LEED v4

Light pollution reduction

Possible 1 point

Submittal Tips (click to expand)
Keep these important GBCI reviewer tips in mind when preparing your submittal documentation and avoid some of the common issues reviewers see during the LEED review process.

SS Credit: Light Pollution Reduction

Option 1: Fixture Shielding
  • Ensure that the documentation confirms that the installed fixtures do not directly emit any light at a vertical angle more than 90 degrees from straight down or confirms that the sum of the mean lamp lumens for each of the fixtures does not exceed 2,500 lamp lumens.
  • Ensure that all lighting, including light fixtures located at the top level of parking garages, are properly shielded or that the sum of the mean lamp lumens for each fixture is 2,500 or less. Compliance with the shielding requirement can be confirmed via manufacturers’ technical data sheets. If for any reason manufacturer documentation is unavailable, photographs of the luminaires can be provided.
Option 2: Perimeter Measurements
  • Ensure that measurements are from at least eight equally distanced measurement points, with a maximum of 100 feet (30 meters) between points. Measurement points must be located along the entire LEED project boundary.
Vertical Illuminance Visualized