HomeOur Work Our Work IDA Colorado Themes What is light pollution? Light pollution Lighting Best Practices Best Practices Public policy Public policy IDA Colorado Programs Lights Out Colorado The National Audubon Society and the International Dark-sky Association are working on this new program. Lights Out Colorado Dark Sky Places Officially-recognized Dark Sky Places in Colorado. Dark Sky Places Sirius Star Award To honor a top contributor to IDA Colorado. Sirius Star Award Join Now Join the International Dark-sky Association IDA members with a Colorado mailing address are automatically part of the Colorado chapter. Colorado chapter members get a monthly newsletter and other benefits.