LeedLightPoll

USGBC LEED for NEW CONSTRUCTION: SS Credit 8

Intent

  • Minimize light trespass from building and site

  • Reduce sky glow

  • Improve nighttime visibility through glare reduction

  • Reduce development impact on nocturnal environments

Implementation

4 Light Zones:

1. LZ1: dark, density less than 200 people per square mile

2.  LZ2: low (residential)

3.  LZ3: medium (commercial, industrial and high-density residential)

4.  LZ4: high major city centers, entertainment districts)

Interior Lighting

  • Stays inside

  • Non-emergency lights shut down at non-business hours

Exterior Lighting

  • provide for comfort and safety only

  • DO NOT exceed 80% of lighting power densities for exterior area and 50% for building facades and landscape features as defined in ASHRAE/IESNA Standard 90.1-2004.

  • DO NOT install lighting more than 2.5 times building height from property line

  • Credit does not apply to 3 story buildings, warehouses, and manufactured homes.

 

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