I have to admit, this week's What's Up With That? query truly had me stumped. But it turns out blue streetlights are explainable, if not ideal.

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 ...

Drivers along Meacham Road in Schaumburg may have noticed a spooky purple glow coming from the streetlights above. It's the result of a defect in the LED fixtures, officials say. John Starks ...

The indigo lights have spawned theories online about everything from vampires to vaccines, but the City of Vancouver says the LED street lights now shining purple are the result of a manufacturing ...

Newly purple streetlights might seem innocuous, but they could affect driver and pedestrian safety ...

LES said it’s a malfunction that’s happening throughout the Midwest. Hundreds of LED lights, which the city installed just a few years ago, are starting to change hue.

As cities and towns switch their streetlights from sodium lamps to LEDs, some lights have turned purple, apparently the result of a manufacturing defect.

A purple glow shining along the Midpoint Bridge that connects Fort Myers with Cape Coral has caught the attention of drivers. Lee County says these lights are a part of a bad batch of LED lights ...

The issue is part of a nationwide manufacturing defect causing the light’s coating to fall off and revealing purple lights instead of white.

Baltimore loves the Ravens, but no, the street lights outside your house are not purple to celebrate football season.