Absorption of light starts with energy of a certain wavelength in this UV-visible region being exposed to a molecule. The light/energy then excites the ground state (non excited) outer or valence electrons to an excited state (high energy).

Ones that do are said to be “UV-active” and ones that do not are “UV- inactive.” To be UV-active, compounds must possess a certain degree of conjugation, which occurs most commonly in aromatic compounds. One can then outline the spots with a pencil, while under the UV light, to mark their location.

Fundamentally, absorption of ultraviolet and visible radiation comes about as the result of transitions of valence shell electrons between different energy levels. The answer is tied up in the bonding and non-bonding electrons within the molecules that comprise the compounds.

ultraviolet C

Visibility. Ultraviolet rays are invisible to most humans. The lens of the human eye blocks most radiation in the wavelength range of 300–400 nm; shorter wavelengths are blocked by the cornea.

ultraviolet C (UVC) ultraviolet radiation with wavelengths between 200 and 290 nm; all of this type of radiation is filtered out by the ozone layer so that none reaches the earth’s surface.

Lamps may emit very specific UVC wavelengths (like 254 nm or 222 nm), or they may emit a broad range of UV wavelengths.

An LED produces a selected wavelength from a small amount electricity. Depending on the composition of the LED it can produce anywhere from infrared, visible, and now UV-C wavelengths.

A key note to understand is that LED lights are actually UV lights also, because they emit light that is within the UV spectrum (specifically UV-A). The traditional UV lights we’ll call compact fluorescent lights (UV CFL), after the bulbs they use.

Some in the lighting business have stated that LEDs do not produce UV radiation. However studies have shown that standard LEDs do create a small amount of UV. That said, the amount of UV they actually emit is even less. This is due to the phosphors within an LED lamp that convert the Ultraviolet light to white light.

The phrase ‘UV Lamp’ is commonly used to refer to the old tube style UV nail lamps. LED Lamp, LED UV Lamp, LED Gel Lamp – These are all the same thing. They are all UV lamps using LED bulb technology. LED Lamps will only cure gel polishes that are specifically designed for LED lamps.

Both LED and UV nail lamps emit UV wavelengths and work in the same way. However, UV lamps emit a broader spectrum of wavelengths, while LED lamps produce a narrower, more targeted number of wavelengths. LED lamps can cure gel polish faster than a UV light. Not all gel polishes can be cured by an LED lamp.

They feature lamps or LEDs that emit UV (ultraviolet) radiation. Exposure to UV radiation can cause damage to your skin, especially if you’re exposed over time. For example, it can lead to premature wrinkles, age spots, and even skin cancer.

For the distinct reason that LED nail dryers offer a faster drying time compared to UV lights, they are said to be safer than UV lights. A faster curing time equals less time one is exposed to harmful radiation, so this is a definite advantage for clients. Second, LED bulbs last much longer than UV bulbs.

Some nail lamps are called “UV” lamps, and some are called LED lamps, but both emit UV radiation. They predominantly produce UVA rays, which have been linked to both premature skin aging and skin cancer.

Although gel manicures can be beautiful and long-lasting, they can be tough on nails. Gel manicures can cause nail brittleness, peeling and cracking, and repeated use can increase the risk for skin cancer and premature skin aging on the hands.

Some dermatology experts shared several concerns about the UV rays emitted from the lamps in nail salons, according to a study conducted by the American Academy of Dermatology. While the UB rays don’t burn your skin, they can damage DNA and collagen, resulting in premature aging like dark spots, wrinkles.

The pain or burning that you feel when you place your hand in the uv light, is called “heat transfer”. This is the gel curing which is basically shrinking while it hardens on the natural nail. The UVA light is attracted to the polymers in the gel which harden as the light penetrates them (i.e., curing).

It’s as simple as that! In fact, since the newer LED nail lamp models take even less time to dry your nails than traditional UV lamps do, it is safe to say that LED lamps are definitely safer than UV lamps.

A fingernail polish UV light doesn’t cover your phone well enough. They make UV cellphone sanitizer. While killing 99.99% of all bacteria and germs, UV-C light can get to the microorganisms that hide in crevices where even cleaning wipes can’t reach.

It is safe to have gel nails while you’re pregnant, so long as you’re careful about having them applied and removed. Most salons use a gel nail system that’s set by an ultraviolet (UV) lamp.

While you will be able to apply gel nail polish without a UV light, the other “processes” of drying are long and will not give the quality results you expect. A UV light is what dries the gel quickly and without fail. It’s impossible to air it out, as it will remain runny or smudge.