Links for Advocates


The IDA hosts the ALAN database of research literature on light pollution. 

The IDA Montana chapter has a large annotated bibliography of research and resources, with links to each. 

Fixture Selection

Discount Fixtures

These Sodor fixtures are available at a discount from a Fort Collins HOA.  These were left over from an installation project.  For more information, use the Contact Us page.  

IDA’s Fixture Seal of Approval.

Search “dark sky outdoor lighting” NOTE:  not all of these are “dark sky” by IDA standards

Standard definitions of lighting terminology, from the Illuminating Engineering Society Resources

Outreach Material

Working Areas

Light Pollution Impact

Neighbor Organizations

Regional (Western U.S.)

Includes a portion of the states Colorado, Utah, New Mexico and Arizona. 

This map shows the location of IDA dark sky places and prospective dark sky places in the Western US.

IDA State Chapters (Western U.S.)