SPECIAL REPORT
Credit achievement rate
XX%
Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »
SPECIAL REPORT
LEEDuser’s viewpoint
Explore this LEED credit
Post your questions on this credit in the forum, and click on the credit language tab to review to the LEED requirements.
Credit language
© 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
Meet the requirements of one of the options below:
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. OROption 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. See all forum discussions about this credit »What does it cost?
Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
See all forum discussions about this credit »Documentation toolkit
The motherlode of cheat sheets
LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.
© 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
Meet the requirements of one of the options below:
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. OROption 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.XX%
Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »
