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LEED v4
Existing Retail
Sustainable Sites
Light pollution reduction

LEED CREDIT

Retail-EBOM-v4 SSc4: Light Pollution Reduction 1 point

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SPECIAL REPORT

LEEDuser expert

Bill Swanson

Integrated Architecture
PE, LEED AP

SPECIAL REPORT

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Credit language

USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To increase night sky access, improve nighttime visibility, and reduce the consequences of development for wildlife and people.

Requirements

Establishment

Option 1. Fixture Shielding

Shield all exterior fixtures (where the sum of the mean lamp lumens for that fixture exceeds 2,500) such that the installed fixtures do not directly emit any light at a vertical angle more than 90 degrees from straight down.

OR

Option 2. Perimeter Measurements

Measure the night illumination levels at regularly spaced points on the project boundary, taking the measurements with the building’s exterior and site lights both on and off. At least eight measurements are required, at a maximum spacing of 100 feet (30 meters) apart. The illumination level measured with the lights on must not be more than 20% above the level measured with the lights off.

Performance

None.

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Frequently asked questions

We have parking garage signs on the building exterior. We’re attempting Option 1 Fixture Shielding. Does the parking signage need to meet the requirements too?

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What about lights on the roof? Do they have to comply?

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What about exterior lighting owned by tenants?

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My building doesn’t have any exterior lighting (no site lighting and no building-mounted lighting). Is my project eligible for this credit?

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Documentation toolkit

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LEEDuser expert

Bill Swanson

Integrated Architecture
PE, LEED AP

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To increase night sky access, improve nighttime visibility, and reduce the consequences of development for wildlife and people.

Requirements

Establishment

Option 1. Fixture Shielding

Shield all exterior fixtures (where the sum of the mean lamp lumens for that fixture exceeds 2,500) such that the installed fixtures do not directly emit any light at a vertical angle more than 90 degrees from straight down.

OR

Option 2. Perimeter Measurements

Measure the night illumination levels at regularly spaced points on the project boundary, taking the measurements with the building’s exterior and site lights both on and off. At least eight measurements are required, at a maximum spacing of 100 feet (30 meters) apart. The illumination level measured with the lights on must not be more than 20% above the level measured with the lights off.

Performance

None.

In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:

  • Calculators to help assess credit compliance.
  • Tracking spreadsheets for materials purchases.
  • Spreadsheets and forms to give to subs and other team members.
  • Guidance documents on arcane LEED issues.
  • Sample templates to help guide your narratives and LEED Online submissions.
  • Examples of actual submissions from certified LEED projects.

We have parking garage signs on the building exterior. We’re attempting Option 1 Fixture Shielding. Does the parking signage need to meet the requirements too?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

What about lights on the roof? Do they have to comply?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

What about exterior lighting owned by tenants?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

My building doesn’t have any exterior lighting (no site lighting and no building-mounted lighting). Is my project eligible for this credit?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

LEEDuser expert

Bill Swanson

Integrated Architecture
PE, LEED AP

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