INTERNATIONAL DARK-‐SKY ASSOCIATION 3223 N First Ave - Tucson Arizona[removed][removed]www.darksky.org TO P RESERVE A ND P ROTECT T HE N IGHTTIME E NVIRONMENT - Bortle Dark-Sky Scale - Document - PDFSEARCH.IO

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Date: 2013-05-31 14:11:08 Planetary science Light sources Skyglow Stage lighting Bortle Dark-Sky Scale Light-emitting diode 243 Ida International Dark-Sky Association Light pollution Lighting Light		INTERNATIONAL DARK-‐SKY ASSOCIATION 3223 N First Ave - Tucson Arizona[removed][removed]www.darksky.org TO P RESERVE A ND P ROTECT T HE N IGHTTIME E NVIRONMENT Add to Reading List Source URL: www.darksky.org Download Document from Source Website File Size: 458,24 KB Share Document on Facebook

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