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Light pollution is the human-made alteration of outdoor light levels from those ocurring naturally. It has harmful effects on:

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We are a recognized global authority on light pollution, empowering a global movement to protect the night sky.
To restore the nighttime environment and protect communities and wildlife from light pollution.


Natural darkness at night is protected worldwide as essential for people and nature.
We empower the dark sky movement and provide leadership, tools, and resources for individuals, policymakers, and industry to reduce light pollution and promote responsible outdoor lighting that is beautiful, healthy, and functional.
We bring the issue of light pollution to diverse communities worldwide, with the goal of creating access to information about the destructive impact of over-lighting and the benefits of responsible lighting.

In all our words and deeds we are guided by our core values.