Why Are Streetlights Turning Purple?

Article - Published by Dark Sky Consulting, LLC

SummaryChromaticity shift is affecting an increasing number of commercial outdoor lighting products. This may affect public perception of solid-state lighting and could change the nature of skyglow over cities. This post explores what it is, why it's happening, and what can be done about it.

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Oregon Skyglow Measurement Network -Technical Report Edition #8 (December 2023)

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How to Start Stargazing in the Willamette Valley