![Works change a street light in the dark sky community of Prestegne, Wales.](https://darksky.org/app/uploads/2024/01/8-Lighting-Tests-1440x700.jpg)
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Tag: partners
![Shanghai skyline at night](https://darksky.org/app/uploads/2023/07/shanghai-at-night-scaled-1-1440x1080.jpg)
Dark skies over Shanghai: Celebrating International Dark Sky Week with the Shanghai Astronomy Museum and Rémy Martin
International Dark Sky Week
You can set your watch by it. At 10 pm every night —11 pm in the Summer— the light …
![](https://darksky.org/app/uploads/2023/03/fi-default.png)
Partners
About
![Responsible outdoor lighting is: 1. Useful, 2. Targeted, 3. Low Level, 4. Controlled, and 5. Warm-Colored](https://darksky.org/app/uploads/2023/08/Five-Lighting-Principles-08-2023.png)
Joining forces to protect the night from light pollution
Press release
![Satellite antenna array under the Milky Way](https://darksky.org/app/uploads/2024/06/Untitled-design-2.png)
Scientific research into light pollution
What we do
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