People were taken by surprise by the strange purple shade of streetlights, found to be something other than an alien attack or a military operation.

Yes, Columbus is in fact working to convert all its streetlights to LED, but also yes, sometimes workers instead repair existing sodium-vapor lamps.

It turns out our reader is both perceptive and observant: yes, Columbus is in fact working to convert all its streetlights to LED, but also yes, sometimes they instead keep sodium-vapor lamps when ...

It turns out our reader is both perceptive and observant: yes, Columbus is in fact working to convert all its streetlights to LED, but also yes, sometimes they instead keep sodium-vapor lamps when ...

It turns out our reader is both perceptive and observant: yes, Columbus is in fact working to convert all its streetlights to LED, but also yes, sometimes they instead keep sodium-vapor lamps when ...

Some use mercury vapors, others apply metal-halide, ceramic metal-halide, and others still use sodium vapor. Secondly, all automobile applications of HID lamps use xenon, but not all of them use ...

“I noticed my sodium lamp was failing so I knew it was gonna get replaced eventually, but I didn’t care because I have lights on my porch and I have landscaping lights,” said Guyot, who is ...

Himalayan salt lamps are crystals carved from amber-colored rock salt hollowed out to fit a lightbulb inside. Learn what the science has to say about claims that they improve your health.