855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 092
Extracted Content
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Install automatic window shades or shielding that limit light transmittance to 10% or less during nighttime.
- The lighting in at least 50% of the nonresidential spaces adjacent to the building’s perimeter is controlled to turn off after hours and/or when there are no occupants.
AND
EXTERIOR LIGHTING
Meet at least one of the following measures:
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All nonessential exterior fixtures are turned off between midnight and 6 a.m.
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Meet the exterior lighting control requirements of ASHRAE 90.1-2019, Section 9.4.1.4.
OR
Option 2. Bird Collision Reduction (1 point)
Glass used below specified heights, on the exterior of the building and site structures, must have a maximum threat factor of 30, as defined in the American Bird Conservancy Threat Factor database.
This applies to all glass, including spandrel glass, when located:
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From grade up to 50 feet (15 meters) measured at all points
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Up to 20 feet (6 meters) measured from the finished grade of a green roof
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At any distance from grade or roof for glass in guardrails and windshields
REQUIREMENTS EXPLAINED
This credit rewards projects that meet the requirements of limiting uplight and interior nighttime lighting or implementing strategies to reduce the instances of bird collision on site.
Minimizing light pollution helps to preserve our night skies, protect wildlife, and improve human health. Strategies include using light shielding, where fixtures direct light downward, and using dimmers, motion sensors, and timers to ensure lights are only on when needed.
To reduce the instances of bird collision, certain architectural features, like glass corners and large windows, can be modified to assist birds in distinguishing reflections of trees and sky in glass. Bird collisions with buildings, especially glass surfaces, are a significant issue, causing millions of bird deaths annually.
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 82