and UV-A, from 315 nm to 400 nm. Products of this class comprise fluorescent tubes without phosphor coatings. Approximately 85 to 90 percent of the energy supplied by these lamps occurs at 253.7 nm.

It’s much more durable than standard air-dry polishes, but it requires UV light to cure. [Becky] bought a lamp to use at home, but it’s very bulky and must be plugged into the wall.

We narrowed the list by looking for lights that provided the recommended 10,000 lux of light and produced as little UV light as possible. We also wanted the light therapy lamps to be easy to use ...

Ultraviolet light, also known as UV light, is a form of energy traveling through space. It is a form of electromagnetic radiation with a wavelength shorter (100 - 400 nanometers) than that of visible ...

"Just one twenty minute drying session using a UV nail lamp can lead to DNA mutations that have been linked to cancer," warns ...

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 ...

Spruce Pine, North Carolina, is one of the few places in the world for mining high-purity quartz, a key component needed for making microchips, solar panels and fiber-optic cables. But destruction ...

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 ...

Here’s how it works. The speed of light traveling through a vacuum is exactly 299,792,458 meters (983,571,056 feet) per second. That's about 186,282 miles per second — a universal constant ...

Red-light masks use low levels of light-emitting diode, or LED, to stimulate skin cells, says Dr. Jennifer Sawaya, a dermatologist at U.S. Dermatology Partners Scottsdale in Arizona.

The material is thick and padded and seemed able to withstand a good smack and maybe even a light drop. The Society6 sleeves also include an industry-standard YKK zipper. It comes in nearly every ...