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.

Case in point, this very slick lamp built by [mytzusky]. Made of nothing more exotic than an old Pringles can and an RGB LED strip, this is something that can potentially be built with what you ...

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

[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 ...

In the fast-light regime, around ω 1, the gradient is steep, so the change of k (Δk fast) with n is small, whereas in the slow-light regime, which has a shallow gradient, around ω 2, a large ...

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 analysis of Greenhouse Effect experiments in the public domain indicated that the lab tests were primarily centered ...

The best smart light switches let you control your lights with a phone or voice assistant and can save you money When you purchase through links on our site, we may earn an affiliate commission.

New research could help ... A Trick of Light: Researchers Turn Silicon Into Direct Bandgap Semiconductor Oct. 31, 2024 — Researchers have come up with a way to turn silicon into a direct bandgap ...

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 ...