Outreach materials from DarkSky International Recommended lighting practices, A Collaborative Effort by the Permian Basin Petroleum Association, the Texas Oil and Gas Association, and the McDonald Observatory Colorado Plateau Dark Sky Cooperative Santa Fe Conservation Trust Pajarito Environmental Education Cebnter Night Sky Santa Fe Dark Sky Land Dark Skies of the Wet Mountain Valley Dark Sky Colorado Dark Sky Texas Arizona Astronomy Consortium Flagstaff Dark Skies Coalition Dark Sky Consulting