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 ...

In the United States and Canada, there have been many reports of LED street lights that were initially white but have suddenly turned purple. The reason for this change in color of LED street lights ...

As cities around the world ditch old school sodium-vapor streetlights, they're quickly replacing them with modern LEDs. They're supposed to be cheaper and longer-lasting than their predecessors, but ...

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 ...