Our Work

Public Policy

Towns and counties develop an Outdoor Lighting Ordinance to regulate outdoor lighting.  Light trespass and shielding are two important issues to consider.  No direct light from any source (including streetlights) should reach another property.  Adequate shielding keeps light contained to the area that needs to be lit. 

Shielding for public policy
Public policy cartoon
Light trespass is a public policy problem.

Light trespass can be a serious problem for residents.

Lighting Policy Annotated Bibliography

This document gives Colorado advocates a reference to the scholarly articles important to discussions with local governments. 

Model Lighting Ordinance

The International Dark-sky Association and the Illuminating Engineering Society have jointly created a “Model Lighting Ordinance.”

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.