When sodium vapor street lamps were replaced by LEDs, soft yellow light was replaced by crisp white. But the change to purple was never supposed to happen.

Researchers find a “cool” way to mitigate background water signals and demonstrate non-invasive blood ion monitoring in living mice ...

In this paper, a low-cost electronic ballast for high-pressure sodium vapor lamps is presented. The proposed ballast is a two-stage circuit that requires only o ...

NASA’s astronaut, Nichole “Vapor” Ayers, has photographed a spectacular atmospheric event – a large red ‘jellyfish’ sprite soaring above a thunderstorm in North America. The striking image, taken from ...

Charleston residents are admittedly proud of their city, and want it to look as nice as possible. They also would like it to be more visible, not only for the ...

Nichole 'Vapor' Ayers shared the photo of what is known as a Transient Luminous Event (TLE) seen above a thunderstorm over ...

An astronaut aboard the International Space Station has shared a striking photo of what is known as a Transient Luminous ...

Humidity, or the amount of water vapor in the air, directly impacts how light travels. On very humid nights, the air is full of water molecules. When the bright light from fireworks hits those ...

Researcher Warren E. Hathaway's report to the American Psychological Association; Findings of the study, involving high-pressure sodium vapor lamps and full-spectrum fluorescent lamps with ...

The bland orange-yellow of sodium-vapor lamps now lights hundreds of miles of U. S. highway. Until recently it has been a ticklish and costly job to get the sodium into the highly evacuated lamps ...

In Sodium Light Years, an ode in video form to the nightscape of New York, natives contemplate the shift from sodium vapor to LED street lights in the city. The video investigates the history of ...

Elementary school students who spent two years working under high-pressure sodium vapor lamps had poorer records of achievement and attendance, plus far slower rates of growth and development ...