Dark-sky Movement - International Dark Sky Association

International Dark Sky Association

The IDA (International Dark Sky Association) began in 1988 and is the only non-profit organization that puts efforts into preserving the night sky. They are the recognized authority for light pollution and are responsible for the "Fixture Seal of Approval program" which offers a third party rating system judging the "sky-friendlyness" of lighting fixtures and in 2009, opened a Public Policy and Government Affairs office in Washington, D.C to inform law makers and lobbyists on energy efficiency of outdoor lighting and to promote the adoption of energy saving measures. The IDA has implemented several simple guidelines to responsible outdoor lighting along with some practical considerations.

• In regards to safety, one needs only the right amount of light, in the right place, at the right time. More light often means wasted light and energy.
• Use the lowest wattage of lamp that is feasible. The maximum wattage for most commercial applications should be 250 watts of high intensity discharge lighting, but less is usually sufficient.
• Whenever possible, turn off the lights or use motion sensor controlled lighting.
• Incorporate curfews (i.e. turn lights off automatically after a certain hour when businesses close or traffic is minimal).

Following the guidelines put in place by the IDA insures that light pollution be kept at a minimum.