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Does a blue light keep you up at night? No, it’s not an alien invasion. The city of St. Paul has been gradually replacing LED street lights suffering from an unusual manufacturer’s defect — they’re ...

If you've spotted spooky purple streetlights in the middle of summer, they probably aren't a sign that a neighborhood has started celebrating Halloween early this year. Instead, the violet hue seen ...

Why do the street lights on West Campus emit an eerie, bluish-purple color at night? Starting in 2021, Triangle area residents observed street lights turning from their standard yellow-white color to ...