Save the Night | Be the Solution, Stop Light Pollution

Nantucket Lights
Nantucket Lights
  • Home
  • About Us
  • Outdoor Lighting Guide
  • ACK Light Pollution
    • How bad is it?
    • Sky Quality Monitoring
    • Outdoor Lighting Bylaw
    • Your Neighbor's Lighting
    • Streetlights
    • Dark Sky Places Program
  • How You Can Help
  • Contact Us
  • In the News
  • Learn More
    • What is light pollution?
    • What about safety?
    • 2021 WPI Student Project
    • 2024 WPI Student Project
    • State of the Science 2024
    • Losing the Dark (Video)
    • DarkSky International
    • DarkSky Massachusetts
    • Dark Skies For Kids
  • Resources
    • ACK Public Forums
    • Bumper Sticker
    • Discover the Night Tee
    • Light Trespass Card
    • Dear Neighbor Letter
    • Five Principles to Follow
    • "Fight for the Stars"
  • Photo Gallery
  • 2022 Student Art Contest
  • Blog
  • Sconset Streetlights
  • More
    • Home
    • About Us
    • Outdoor Lighting Guide
    • ACK Light Pollution
      • How bad is it?
      • Sky Quality Monitoring
      • Outdoor Lighting Bylaw
      • Your Neighbor's Lighting
      • Streetlights
      • Dark Sky Places Program
    • How You Can Help
    • Contact Us
    • In the News
    • Learn More
      • What is light pollution?
      • What about safety?
      • 2021 WPI Student Project
      • 2024 WPI Student Project
      • State of the Science 2024
      • Losing the Dark (Video)
      • DarkSky International
      • DarkSky Massachusetts
      • Dark Skies For Kids
    • Resources
      • ACK Public Forums
      • Bumper Sticker
      • Discover the Night Tee
      • Light Trespass Card
      • Dear Neighbor Letter
      • Five Principles to Follow
      • "Fight for the Stars"
    • Photo Gallery
    • 2022 Student Art Contest
    • Blog
    • Sconset Streetlights
  • Sign In

  • My Account
  • Signed in as:

  • filler@godaddy.com


  • My Account
  • Sign out

Signed in as:

filler@godaddy.com

  • Home
  • About Us
  • Outdoor Lighting Guide
  • ACK Light Pollution
    • How bad is it?
    • Sky Quality Monitoring
    • Outdoor Lighting Bylaw
    • Your Neighbor's Lighting
    • Streetlights
    • Dark Sky Places Program
  • How You Can Help
  • Contact Us
  • In the News
  • Learn More
    • What is light pollution?
    • What about safety?
    • 2021 WPI Student Project
    • 2024 WPI Student Project
    • State of the Science 2024
    • Losing the Dark (Video)
    • DarkSky International
    • DarkSky Massachusetts
    • Dark Skies For Kids
  • Resources
    • ACK Public Forums
    • Bumper Sticker
    • Discover the Night Tee
    • Light Trespass Card
    • Dear Neighbor Letter
    • Five Principles to Follow
    • "Fight for the Stars"
  • Photo Gallery
  • 2022 Student Art Contest
  • Blog
  • Sconset Streetlights

Account


  • My Account
  • Sign out


  • Sign In
  • My Account

Outdoor Lighting Guide > Outdoor Lighting Bylaw > Path Lights

Path Lights

Outdoor Lighting Bylaw Requirements

Even though some unshielded fixtures are allowed (as long as they satisfy all the applicable requirements), using only fully shielded fixtures would be the most dark-sky and neighbor friendly thing to do.

Unshielded or Partially Shielded

  • Must be 600 lumens or less (Section 102-4A) *


  • Must be 2700K or less in color temperature (Section 102-4B)(2400K or less is recommended to be the most dark-sky and neighbor friendly).


* Note that there is a limit on the total lumens allowed for all fixtures (combined) that aren't fully shielded (see Section 102-4C(2)). For this reason, we recommend using fully shielded fixtures, whenever possible. 


Exception:

Path lights used for safety and security that are on only temporarily (e.g., on a motion sensor) are not subject to these restrictions. (Section 102-7C)

Fully Shielded

  • Must be 1500 lumens or less (5000 or less on nonresidential properties) (Section 102-4C(3))


  • Must be 2700K or less in color temperature (Section 102-4B)(2400K or less is recommended to be the most dark-sky and neighbor friendly)


  • Nonresidential properties: On nonresidential property, path lights used for safety and security may be used throughout the night only if any fixture with a lumen output above 600 lumens is dimmed by at least 50% (Section 102-4D(2)). Otherwise, they must be turned off within one hour after closing and not turned on more than one hour before opening (Section 102-4D(1)).


There is a cap on the total lumens allowed per site (see Section 102-4C(1)), all fixtures combined, so we recommend using only 100 to 200 lumens per fixture for this kind of lighting.


Exception:

Path lights used for safety and security that are on only temporarily (e.g., on a motion sensor) are not subject to these restrictions. (Section 102-7C)

Copyright © 2023 Nantucket Lights - All Rights Reserved.

  • Home
  • About Us
  • Outdoor Lighting Guide
  • How You Can Help
  • Contact Us

Powered by

Cookie Notice

We use cookies to analyze website traffic to make our website better. By accepting our use of cookies, your data will be aggregated with all other user data. If you decline, your data will not be retained. Thank you for visiting!

DeclineAccept

Do you want to help preserve Nantucket's dark skies?

The more supporters we have, the more influential we can be. Join our email list to show your support for our mission and to get updates, calls to action, and other important information delivered directly to your inbox. 

Sign-Up