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.

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 ...

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 ...

BBMP replaces sodium vapour lamps with LED lights to save energy and reduce electricity bills in Bengaluru.

Scientists have pioneered a new way to monitor sodium levels in the blood—without drawing a single drop. By combining terahertz radiation and optoacoustic detection, they created a non-invasive system ...

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

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 ...

The quantum battery (QB) has been proposed as an alternative to the electrochemical energy storage devices we know so well.

In a new study, researchers demonstrate long-term, non-invasive monitoring of blood sodium levels using a system that combines ... scatters less than near-infrared and visible light and is sensitive ...

Electronic ballasts usually present two stages, one for feeding the high pressure sodium (HPS) lamp and the other for power factor correction (PFC). This paper presents electronic ballasts using ac-ac ...

Metals can be used as fuels, just like oil, gas, or hydrogen, because they release energy through burning or electrochemical reactions. Light metals like ...