Links for Advocates
IDA Colorado Beginner's Guide
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.
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
Light Pollution Impact
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. Revised 11/2020.
IDA State Chapters (Western U.S.)