Black light is a light bulb with an inner coating that limits the wavelengths that can pass through the glass. It emits only a very small amount of light visible to the human eye, and most of what black light emits is invisible ultraviolet (UV) or black light radiation.
However, certain colors and pigments do absorb invisible light and then release it to produce a luminous effect. These lights are often used for recreational purposes(glow in the dark), but those that produce short- and medium-wave UV are used by forensic and other types of scientists as well as medical professionals.
We have compiled a list of frequently asked questions about black lights to address any concerns you may have about them.
Why black light is called black light?
Black light is a special gas discharge lamp, it emits 330-400nm ultraviolet light wave, which is human insensitive light, so the lamp made of this human insensitive ultraviolet light is called black light.
What is a UV black light used for?
Common black lights are used for the following purposes:
Forensic scientists use black lights to find hidden evidence at crime scenes.
To check the hygiene level of hotel rooms or public restrooms.
Pet stain detection and pest control.
Counterfeit detection and identity verification.
Antique and artwork inspection.
As auxiliary lighting equipment, stage lights or ambient lights.
Is black light and UV light the same?
Black light is a type of ultraviolet light that emits ultraviolet radiation. The wavelength of this radiation is shorter than that of violet light, which is the shortest wavelength of light in the visible component of the electromagnetic spectrum.
How long can a black light stay on?
Ideally, UV LED lights can last 25,000 hours or more. A qualified black light has high quality performance and will not burn out easily.
Does black light increase the risk of skin cancer?
There is no evidence that the use of UV black light insect traps increases the risk of skin cancer because the amount of UV radiation they emit is very low. Black lights emit a type of ultraviolet radiation called UVA that is not visible to the human eye. They are commonly used in industry, nightclubs or amusement parks to make things glow.
This glow is the energy given off by particles called phosphorescence that convert light into visible light. These particles are found in certain objects, including your teeth and fingernails. Many insects can see ultraviolet light, so black lights are often used in "bug zapper" type traps.
Black lights are usually fluorescent or incandescent bulbs that have been modified to allow only UVA and some visible light to be emitted. UVA is thought to cause premature aging and has recently been linked to some skin cancers, but UVB is the leading cause of skin cancer.
Exposure to black light is well below accepted safety limits for UVA and is not dangerous to people who use them, work near them, or use them in their homes. Exposure to black light will be much lower than if you were exposed to UVA outdoors.
Why color paint glows under black light?
Black lights can emit high-energy ultraviolet light. Ultraviolet light is imperceptible to the naked eye. Interesting things happen when UV light is reflected back from objects containing special substances called phosphorescent bodies.
Fluorescent substances can absorb ultraviolet light and then re-emit it almost instantaneously. Some energy is lost in the process, so the light emitted has a longer wavelength than the absorbed radiation, which makes this light visible and makes the material appear to glow.
Does Blacklight hurt your eyes?
The light emitted from the black light is UVA, which is very less damaging compared to UV light. However, sufficiently intense UV-A and blue radiation can cause chemical damage to the retina. Short-term or long-term exposure to UV radiation can cause damage.
This can damage your eyes, affect your vision, and cause deterioration in your overall eye health. Glare discomfort can also occur with exposures that are within safe limits. Try to avoid looking directly at lighting equipment.
What are the effects of prolonged exposure to black light?
Because black light can radiate ultraviolet light (UVA), so long-term work in this environment, excessive ultraviolet light causes photochemical reactions, which can cause a series of changes in human functions, especially children, need special attention. Long-term exposure of humans to UV light can cause harm to the skin, eyes, and immune system.
How many black lights are needed for a DJ party？
Generally speaking, it depends on how big the whole space is. There are different kinds of blacklight bulbs, blacklight floodlights, blacklight strips, blacklight bar and also different wattage options. Usually, a 100W blacklight floodlight brightness can cover a 40 x 40 feet space.