MODEL LIGHTING ORDINANCE
International Dark-Sky Association
IDA and the Illuminating Engineering Society (IES) proudly announce public release of the Model Lighting Ordinance (MLO) as a valuable guide for environmentally responsible outdoor lighting in North America. Developed jointly by the IDA and the IES over a period of seven years, the IDA/IES partnership will encourage broad adoption of comprehensive outdoor lighting ordinances without devoting extensive staff time and resources to their development.
The MLO outdoor lighting template is designed to help municipalities develop outdoor lighting standards that reduce glare, light trespass, and skyglow. The MLO offers several innovations to outdoor lighting regulation, including the use of five lighting zones to classify land use with appropriate lighting levels for each. Zones range from LZ0, designed for pristine natural environments andlimited outdoor lighting, to LZ4, for limited application in areas of extensive development in the largest cities. The second innovation limits the amount of light used for each property. Third, the MLO uses the IES’s new TM-15 -11 "BUG" (Backlight, Uplight and Glare) classification of outdoor lighting fixtures to ensure that only well-shielded fixtures are used. No uplight for area and street lighting is allowed in any zone. The MLO will be revised on a regular basis to include new information, feedback from municipalities using it and changes to IES standards.
About the Model Lighting Ordinance
The International Dark-Sky Association (IDA) and the Illuminating Engineering Society of North America (IESNA) have developed the Model Lighting Ordinance (MLO) to address the need for strong, consistent outdoor lighting regulation. Please download and distribute.
Approved June 14, 2011
Règlement Type sur l’Éclairage Extérieur (Français)
Translation provided by IDA Quebec
After the first public review (2009), the MLO was revised as follows:
Addressing comments after the second public review (2010), the MLO was revised as follows:
Model Lighting Ordinance
Comments & Revisions
The following documents contain comments and changes to MLO Draft II. The left side of the document contains original MLO text. The right side shows public comments. Responses and revisions appear in red.
An MLO presentation by IDA board member, Jim Benya, PE, FIES, IALD, LC
New Resource! An open letter by IDA Executive Director Bob Parks and IDA co-founders Dt. David Crawford and Dr. Tim Hunter discusses how the collaborative process has been a successful model for past IDA triumphs. Read letter >>
To better inform the public on the mechanics of the MLO, IDA is offering a series of Webinar educational sessions. The first such Webinar, streamed live from the 2010 Annual General Meeting in Tucson, AZ, is available at the link below.
IDA on TV
IDA Executive Director Bob Parks was recently interviewed about light pollution on CBS This Morning. Watch the video here.
Light Pollution in Men's Journal
The December 2013 issue of Men's Journal has a nine-page article on light pollution. Read "How Light Pollution is Stealing the Night Sky."
IDA's Current Lighting Estimates
Check out IDA's new lighting estimates: World Outdoor Lighting Facts. Click here to see a larger graphic
Member of the IDA Board of Directors interviewed on slashdot.org:
IDA Board Member, Kelly Beatty, was interviewed on Slashdot about the importance of protecting the night sky and how LEDs are encouraging the change. Read More >>
New Mexican Skies Protected with Dark Sky Park Designation
The 34,000-acre Chaco Culture National Historical Park has been designated as the world's newest "Gold Tier" International Dark Sky Park. Read more >>
IDA Dark Sky Giveaway Winner
Skyglow Berlin Project for Kids
Uwingu Supplies Grant to Help Save Our Stars
The International Dark-Sky Association recently became the recipient of a grant from the Uwingu Fund in support of the new IDA- program Save Our Stars. Read the IDA Press Release >>
Measuring Night Sky Brightness?
There's an App for That
Astronomers and dark sky-advocates take note—you can now measure the brightness of the night sky using your smartphone. Read the IDA Press Release >>
Interest in our International Dark Sky Places is on the rise. Learn all about them here.>>
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