High intensity discharge (HID) is a general term for mercury, metal halide, and high-pressure sodium lamps. Mercury lamps operate at a relatively high pressure and temperature. Most of the light is ...

All urban stargazers know this and have done since the switch from orange sodium vapor lamps to white LEDs, which emit much more blue light. Now we have a mass of observational evidence.

While an unfortunate few still suffer under one of the awful colors offered by vapor discharge lamps, like the pink or orange of sodium or the greenish-white of mercury, most municipalities have ...

There are also traditional light-pollution filters, which reduce light at wavelengths produced by mercury- and sodium-vapor ...

Street lights rely on light emitting diode (LED), incandescent, high pressure sodium, low pressure sodium, mercury vapor, metal halide, and high intensity discharge (HID) bulb technology to provide ...

The same light you see in street lamps ... the actors would stand in front of a white screen lit by a yellow hue from sodium vapor lights, hence its name, the sodium vapor process.

[The Action Lab] uses his coil to make a metal plasma — in particular, sodium. You can see the results in the video below. To create a metal plasma, you need a metal vapor and sodium can create ...

with the beam-splitter prism diverting light through the camera lens onto two different strips of film at the same time. One ...

Learn more› By Gregory Han We will soon be adding CB2’s Pavo Double Floor Lamp, currently in our Other Good section, as a new pick. We've also moved the Lepower Wood Tripod Floor Lamp ...

The kiln facility offers five large 10 cubic foot Skutt electric kilns, one large 18 cubic foot oval Bailey electric kiln, a 90 cubic foot updraft gas kiln, a 40 cubic foot updraft gas kiln, a 50 ...

Daniela Augenstine, who worked in Berlin's street furniture department, told The Guardian that the east uses sodium-vapor lamps, which are older and produce a yellower light, while the west uses ...