Applications of UV-A 356nm light

1. Metal Industry

A UV-A(365nm) lamp is often used in non-destructive testing, an examination method for welding joints or castings, for example. A UV-A(365nm) lamp and a fluorescent liquid can be used to quickly determine any defects (cracks).

Penetrant crack testing (‘Farbeindringverfahren’) is a very old technique that uses the capillary action of liquids. This involves dipping or painting products with a fluorescent liquid that soaks into any cracks. If the parts are then inspected with a UV-A(365nm) lamp, any cracks in a product or weld will light up brightly. It is a fast and cheap NDT technique that can be used for various purposes. In addition to the term non-destructive testing (NDT), non-destructive inspection (NDI) or non-destructive evaluation (NDE) is also used. The technique described here can also be used for research in:

Oil and gas industry control of pipelines.
Aviation check for cracks or metal fatigue in a landing gear, for example.
shipping inspection of ship components.
Defence control of military vehicles.

2. Cleaning Industry

To check the quality of cleaning work and to introduce improvements, a UV-A(365nm) lamp can be used. We recommend an inspection 2 hours after cleaning. With UV-A(365nm) light, cleaning errors can be made visible. Such as systematically missing parts of the surface to be cleaned, smearing dirt to edges and corners, or drips of detergent. Textiles and bedding can also be checked for cleanliness. A clean surface looks even. In case of errors, those responsible for cleaning – the client, the cleaning company and the cleaner himself – can be confronted with a clear visual result. It is often found that either systematic or occasional errors are made. If there’s any actual cleaning done. This can be due to all sorts of factors: from inadequate instruction or training to a lack of guidance and control or too little motivation and appreciation. “If you want to achieve improvement, you have to give feedback.” The UV-A(365nm) lamp provides sufficient evidence for this.

3. Laboratoria

A UV-A(365nm) flashlight can be used in research laboratories for visualizing nucleic acids after gel electrophoresis and ethidium bromide staining. A UV-A(365nm) lamp can also be used for detection of chemical residue and particles.

4. Medical world

Much in the news are (the operating rooms of) hospitals and mostly negative. Due to a lack of coordination and unclear division of tasks and responsibilities, some places are rarely or never cleaned. This causes the dust to accumulate. The rack where all kinds of instruments are stored in sterile packaging is itself far from sterile. The bottom of an eye surgeon’s operation lamp was also found to have never been cleaned, a check with a UV-A(365nm) lamp showed. The cleaning has been outsourced to a cleaning company which, however, is not allowed to touch the equipment. Then it is unclear who should do it. So, mistakes can happen that you don’t want to happen on healthcare sites. With a UV-A(365nm) lamp this can be prevented by performing a short daily inspection. With a worthy UV-A(365nm) lamp you only have to shine through a room for a short time and pretty soon a not (well) cleaned surface will light up. And if it is cleaned properly, this is also quickly detected. Through this short inspection you can very easily prevent a lot of problems and you can guarantee patient safety.

5. Hand hygiene training

Special UV lotion can be used to check whether sufficient hand hygiene is present. Otherwise, handwashing training can be given so can be practised in schools and medical facilities. This training makes it easy to see whether all areas of the hands are clean after washing them. If this is not the case, spots on the hands will light up under UV-A(365nm) light after handwashing. These spots with (UV lotion) then visualize nicely where any bacteria remained on the hands.

6. Bruising

In forensic medicine, UV-A(365nm) light is used to visualize skin injuries. It has been reported that UV-A(365nm) light can help visualize an old bruise and also provide an estimate of the shape of the object that caused the bruise. For example, when the bruise was faint, old and difficult to identify, UV-A(365nm) light was used to successfully identify bite wounds 6 months after an injury. This application is for example very useful for research on children after suspicion of child abuse bruises remain visible long after incidents under UV-A (365nm) light

7. Woodslamp

The Wood’s lamp is a UV-A(365nm) lamp. It is used as a diagnostic tool in skin diseases, both in humans and animals, including mycoses (tinea capitis), which light up in different colors (fluorescence), and erythrasma.

– Green: Trichophyton schoenleinii, Microsporon audouinii, Microsporum canis.
– Yellowish brown: Malassezia furfur (pseudohyphae of Pityrosporon orbiculare (pityriasis versicolor)).
– Rood, fel oranje: Corynebacterium minutissimum (Erythrasma).
– Red in a follicular pattern: progressive macular hypomelanosis

Hair stumps infected by Favus (Trichophyton schoenleinii) light up greenish yellow. Other Trichophyton species have an endothrix growth habit (inside the hair) and give no fluorescence.

8. Police detective

UV-A(365nm) light helps you see what your eyes can’t see at a crime scene. At a crime scene, fast and accurate detection of possible traces is of vital importance. Many biological/body fluids are fluorescent in nature. When such traces are illuminated with light of the correct wavelength, deciding which light source to use to achieve the best result in finding traces at the crime scene is an art. It takes years of experience to learn which light to use depending on the occasion – it’s not an exact science. New users using UV light may naturally use combinations of light and glasses to determine what is the best option for that occasion, by trial and error, until confidence and knowledge is built up. No two crime scenes are alike. No police detective uses the same method,

What body fluids are fluorescent
– Sperm (DNA)
– Vaginal discharge (DNA)
– Urine (DNA if it contains blood or other body fluids)
– Sweat (DNA)
– Saliva (DNA)

Bloodstains Through the use of ultraviolet light, it is possible to do an effective and quick check for possible bloodstains. A bloodstain exposed to UV-A(365nm) light absorbs all light of that bandwidth and does not reflect – that is, it does not fluoresce in any way. So the stain will appear black under UV. Although it is not a conclusive test for blood, it is an effective presumptive test and can often require unnecessary collection of stains that look like blood but are actually from another source.

Bone fragments light up under UV-A(365nm)

Fingerprints There are also methods known in which a UV-A(365nm) lamp can be used to detect fingerprints.

Interception of secret messages can be quickly screened for invisible ink and also read without first making the invisible ink permanent

Narcotics Some narcotics such as amphetamine, cocaine and certain MDMA tablets are clearly fluorescent when illuminated with UV-A(365nm) light. Even minute quantities of certain narcotics can easily be made visible when illuminated with UV-A(365nm) light, making the work of investigating officers much easier when, for example, searching for suspected narcotics. Powder and powder residues left on clothes, hands, tables, sinks, scales, etc, which are normally not visible in normal light, become highly visible when using UV-A(365nm) light.

9. Police detective / Police / Mobile unit / Gendarmerie

SmartWater, SelectaDNA, tagging spray, The spray is designed to be applied to theft-prone objects. If the police raid a fence, they can use a UV-A(365nm) lamp to check for items treated with synthetic DNA. Via the particles with microcode, the owner can be identified. Tried using the same technique to mark robbers leaving the store. And railroads use such spray to mark copper, making it easier to track down copper thieves or robbers.
They are also investigating whether the sprays can be used to track down rioters. A UV-A (365nm) lamp can also be used to check whether the spray has been applied correctly.

10. SmartWater detection

Check if SmartWater, SelectaDNA or other tagging spray has been applied correctly to objects, also search for objects with this paint with a UV-A(365nm) lamp.

11. Safety professionals

Anyone who in practice deals with determining the authenticity of value documents, such as passports, identity cards, residence permits, driving licences, diplomas, official acts, visas etc. but also for example banknotes or stamps must have come across the necessary forgeries. A UV-A(365nm) lamp is therefore indispensable in the process of determining authenticity. For example, fluorescent patterns or metal chips are included in such value documents, which light up clearly under UV-A(365nm) light. These are often difficult to counterfeit, and therefore a UV-A(365nm) lamp is indispensable and an important part in determining authenticity.

12. Fire Department

How UV light is used in arson. Fire investigators use ultraviolet light as a simple, reliable and cost-effective method of detecting arson.

Ultraviolet light is used to detect information otherwise invisible to the human eye and uncover valuable information that can be used to solve a fire investigation. UV light is used to: – determine the presence of accelerants – identify flow patterns UV light not only helps to determine the presence of accelerants (a substance that accelerates the spread of fire or makes a fire more intense), but also to quickly detect remnants of accelerants and locate where the fire started. The colour that accelerators glow is affected by exposure to heat.

The longer an accelerator has been exposed to heat (i.e. its origin), the more its fluorescence colour differs from that of other, less exposed areas. Traces of accelerants are absorbed in a fire and are therefore almost always invisible to the naked eye. However, the accelerator-affected surface is easily distinguishable under UV light.

Hydrocarbons Volatile hydrocarbons such as petrol, kerosene and other petroleum fractions such as benzene, acetone, grease, lard, vegetable oils, paints, etc. fluoresce when exposed to UV light. By using UV light, researchers can accurately determine where samples should be taken for further laboratory analysis. UV light can also be useful in locating fragments of incendiary bombs, as explosive casings are often fluorescent. Samples collected in cans and plastic evidence bags can be heated in hot water to form condensation.

The latent remains of the accelerator come to the surface and this can be observed under UV light. UV light was used to identify accelerator casting traces, accelerator reservoir shape, and casting traces leading back to accelerator containers. UV light indicates accelerants long after their smell is detectable. Masking an accelerator does not prevent UV detection. Accelerant on skin or clothing will also fluoresce.

Advantages of UV light compared to sniffer dogs or mechanical “sniffers”-The use of UV light is not affected by wind conditions.-The “sniffer” indicates a general area of saturation, but does not detect specific contaminated areas. This makes sampling difficult. UV light detects specific areas. – The “sniffer” is not effective until two to three days after saturation. UV lamps have been proven to effectively fluoresce samples for up to two months after an incident.- After a prolonged hot fire, accelerant odours are usually gone.

13. Mechanic/installer

A technician can use UV-A(365nm) light to detect leaks. This technique is already widely used in air conditioning systems. A fluorescent liquid is added to the coolant and if a leak occurs it can easily be found with a UV-A(365nm) lamp. This fluid is often added to air conditioning systems as standard. But not only for A/C leaks, there are different fluids available on the market for different purposes. Some liquids already fluoresce under UV-A(365nm) light engine oil and petrol are fluorescent with a lamp of the right strength. Also, some water pipe leaks can be found with a UV-A(365nm) lamp because water leaves calcium residue and this calcium then lights up. Furthermore, most biological liquids light up under UV-A(365nm) light.

14. Art Restoration/Conservation Studies

To enable restorers/conservators to demonstrate evidence of imperfections, restoration and repair on objects such as paintings, paper, books and ceramics, which are not readily visible under normal lighting. Other applications include detecting forgeries, moulds, and improving hard-to-read papers and parchments. The inspection of works of art under UV-A(365nm) light is a means of revealing imperfections and evidence of restoration, an important aspect of authentication for valuation and sale also

15. UV paint drying

A UV-A(365nm) lamp is ideal for drying UV lacquers, primers, adhesives, nail polishes and putty. With UV-A(365nm) light you shorten the curing time and curing time considerably, so repairs and damage repairs can be done faster, especially for spot repairs where more and more work is done on locations and outside, the technique can be very useful. So you can quickly spray a car before a rain shower because you are not bound to longer drying times. Also, nail polishes dry superfast, so you don’t have to wait long, until your nails are dry again before you can do anything else.

16. Clear varnish validation

UV-A(365nm) lamps are commonly used for clear coat validation on printed circuit boards to ensure uniform coverage. Also on other spray jobs you can check if there is an even coverage of clear coat, an even coverage gives an even fluorescence, an uneven coverage gives dark and light spots in the clear coat.

17. Detection of particles before coating

Before powder coating or spraying an object, it is important that the surface is free of grease and dust. Grease prevents paint from adhering properly. Dust particles then cause unevenness in the paintwork. A UV-A(365nm) lamp is ideal for detection of (dust) particles. A large part of particles light up under UV-A(365nm) light. A good white light flashlight can also be used, under floodlight (light from the side) is dust also very visible. So on surfaces where dust particles are not wanted, UV-A(365nm) light can be used very well.

18. Detection of particles in cleanrooms

In a cleanroom, UV-A(365nm) light can be used to detect dust particles. And the light can then be used to remove dust particles from equipment – after all, dust is a cleanroom’s worst enemy. Because of the different particle colours, even the origin of a (dust) source can be determined.

19. Hydrocarbons

The smallest amount of hydrocarbon contamination (oil or grease) in an oxygen vessel or connecting line can have catastrophic consequences. It’s literally an explosive mixture. Most hydrocarbons will naturally fluoresce under UV-A(365nm) illumination. Therefore, this process is absolutely essential for all manufacturers of oxygen tanks and equipment.

20. Follow-up ultrasonic cleaning

A follow-up check can be carried out using UV-A(365nm) light to see whether objects have been sufficiently cleaned. After an ultrasonic treatment it can be determined whether there is still dirt or surface deposits present, especially in places that are difficult to see, for example in the channels of a carburettor. It can be examined whether these are sufficiently cleaned because any dirt lights up under a UV-A (365nm) lamp, it can be quickly determined whether the treatment has been sufficient.

21. Glass industry

In glassware, hairline cracks can be detected with a UV-A(365nm) lamp. Also, old repairs can emerge under UV-A(365nm) light.

22. Ceramic industry

Under UV-A(365nm) light, (hair) cracks in ceramics can be made clearly visible, so an easy and quick quality control can be performed. Both newly produced ceramic objects and old repairs can be made visible under UV-A(365nm) light.

23. Food inspection

Aflatoxins are carcinogenic chemicals produced by special types of fungi that are contaminated in food and feed such as corn, peanuts, sorghum, copra, pistachios, and cottonseed. Aflatoxin contamination does not usually appear in the field. It usually occurs when harvested crops are stored in damp places where mould easily grows. If aflatoxin is detected early, it can be isolated and spread can be prevented. This helps prevent product contamination and financial loss and ensures the safety of agricultural products. With a UV-A(365nm) lamp, the presence/absence of aflatoxin and mould can be determined. If a fresh sample glows green-gold under UV-A(365nm) light, aflatoxin is most likely present, but additional laboratory testing is usually required to draw definitive conclusions.

– Primary contamination: Cereals are already contaminated during cultivation by fungi such as ergot on rye, wheat and barley (so-called field mycotoxins, especially the Fusarium mycotoxins).

– Secondary contamination: stored food becomes mouldy due to Aspergillus or Penicillium (so-called storage mycotoxins (aflatoxins and ochratoxin A). Buildings and equipment can also be a source of contamination

– Metabolism in the animal: Cattle receive mouldy foodstuffs and the mycotoxins are metabolised. They end up in the end products: milk, eggs, meat. An example is aflatoxin M1, which is formed in the milk after contamination with aflatoxin B1.

Checking for Mycotoxin (aflatoxin) with a UV-A lamp is possible for primary and secondary contamination (Aspergillus, Penicillium, Fusarium, Alternaria, Alternaria, Fusarium).

24. Preventive crop care for vineyards and orchards

Prevention is an effective strategy to protect crops from diseases. By applying bactericides, you can protect leaf scars and other injuries and minimize disease. It is of utmost importance that this process is repeated, to protect new wounds when they appear. Grapes, almonds, walnuts, olives and plum growers are examples of crops that have had great success with this treatment. Application process:Add a food grade water-based fluorescent dye to the syringe containing bactericides. Spray bactericides and dye on crops and orchards during the day. Inspect the density and coverage of the dye and thus the coverage of the bactericides on the crops after sunset, with UV-A(365nm) light.

25. Egg inspection

In Europe, it is forbidden for producers and processors/packers to wash or brush eggs. This is because it will damage the cuticle of the egg, which guarantees safety against disease and rotting. A UV-A(365nm) lamp can be used to check that eggs have not been washed or brushed after all. Washing or brushing leaves traces which become visible under UV-A(365nm) light.

26. Quality control of citrus fruit

UV-A(365nm) light can be used in citrus packing plants, and citrus farmers as an aid in the identification and removal of rotten oranges. On the packaging line or in a storage warehouse

This technique works because the rotten spots on, for example, oranges fluoresce strongly under UV-A(365nm) light. It was found that oranges often have spots on the peel that fluoresce less strongly than others, and experiments were conducted to determine whether the presence of these spots was predictive of fruit quality after storage.

Three separate experiments were conducted in the UV room of a packing plant where oranges were removed from the packing line and classified into different classes based on the amount of peel fluorescence present: class 0, with little or no fluorescence; class 1, with a limited number of small fluorescent areas; class 2, with numerous fluorescent areas; and class 3, with large fluorescent areas indicating spoilage or severe mechanical damage.

After 3 weeks at 15 °C, fruits were assessed and divided into groups based on skin quality and presence of spoilage. Fruit classed as marketable were those that could be classified as A high quality. Class 3, the fruit that would be disposed of in UV rooms under current practices, showed a high degree of spoilage and only 5% of the fruit could be considered A saleable after 3 weeks of storage.

Classes 0 and 1, representing fruits with no or low fluorescence, were of similar quality and on average 57% of the fruits were marketable after 3 weeks of storage. In contrast, only 28% of Class 2 fruit were marketable after the same storage period, which was due to skin damage and deterioration during storage. Fluorescence of the peel, even in amounts lower than currently considered in commercial packing plants, has been shown to be a predictor of orange quality after storage.

You can also use a UV-A(365nm) lamp to see if a citrus fruit peel has been treated with chemicals.

27. Geology

The colour change of fluorescent minerals is most spectacular when they are illuminated in the dark with ultraviolet light, and they give off visible light.

Fluorescence in minerals occurs when a specimen is illuminated with specific wavelengths of light. UV light, X-rays, and cathode rays are the typical types of light that produce fluorescence. These types of light have the ability to excite sensitive electrons within the atomic structure of the mineral. These excited electrons temporarily jump up to a higher orbital within the atomic structure of the mineral. When these electrons fall back into their original orbit, a small amount of energy is released in the form of light. This release of light is known as fluorescence.

The wavelength of light released from a fluorescent mineral is often markedly different from the wavelength of the incident light. This causes a visible change in the colour of the mineral. This “glow” persists as long as the mineral is illuminated with light of the correct wavelength.

So different wavelengths can be used in the study of minerals

Most of the fluorescent minerals light up best under a short wavelength (100-280 nm UV-C) and a smaller portion light up best under a long wavelength (315-400 nm UV-A)

Practical use of mineral fluorescence and fluorescence of rocks.

Fluorescence has practical applications in mining, gemology, petrology, and mineralogy. The mineral scheelite, an ore of tungsten, typically has a bright blue fluorescence. Geologists looking for scheelite and other fluorescent minerals sometimes search for them at night with ultraviolet lamps.

Geologists in the oil and gas industry sometimes examine drill cuttings and drill cores with UV-A(365nm) lamps. Small amounts of oil in the pores of the rock and oil-stained mineral grains will fluoresce under UV-A(365nm) illumination. The colour of the fluorescence can indicate the thermal maturity of the oil, with darker colours indicating heavier oil and lighter colours indicating lighter oil.

UV lamps can be used in underground mines to identify and detect ore-bearing rocks. They have also been used on picking lines to quickly find valuable pieces of ore and separate them from waste.

Many gemstones are sometimes fluorescent, including ruby, kunzite, diamond, and opal. This property can sometimes be used to find small stones in sediments or crushed ore. It may also be a way to associate rocks with a mining site. For example: light yellow diamonds with a strong blue fluorescence

are produced by the Premier Mine in South Africa, and colourless stones with a strong blue fluorescence are produced by the Jagersfontein Mine in South Africa. The stones from these mines have the nicknames “Premiers” and “Jagers”.

Fossils Searching for fossils with a UV-A(365nm) lamp gives the result that especially for very small tooth and eggshell fragments searching at night with UV-A(365nm) light can result in considerably more specimens than searching during the day using standard collecting techniques. Bone fragments also light up under UV-A(365nm)

Petroleum contaminated soil examination UV-A(365nm) light can help in the examination of petroleum contaminated soil and sediments. The visible fluorescence of many petroleum products under UV-A(365nm) light often provides a striking contrast to surrounding, uncontaminated areas. This contrast can be used in a variety of applications, including delineating the extent of petroleum in excavations, locating contaminants along shorelines, and selecting sample intervals in sediment cores.

28. Collectors

For collectors of stones, stamps, value documents, uranium glass or other diverse subjects it can be very interesting to observe a collection from a different perspective.

29. Pest Controllers

When a Rat or Mouse invades a kitchen, restaurant, food store or food processing plant, it is important to immediately find out where they are and the route they take to find food and shelter. The bigger the company, the harder it is to find all the hiding places and routes in the building.

Rodents are smart, agile and small, making it easy for them to get into places people can’t reach or don’t even think to check. They can climb along cables, cords, pipes and tubing and squeeze through small cracks and holes. They also gnaw holes in very many materials to gain access to buildings and hidden places. Why are rodent inspections so important?

The first step in controlling rats and mice is to inspect the infested property to find out how many there are and where they are hiding. These days, there are still many pest controllers who simply place poison or traps without a proper understanding of which areas of the property to do so in.

There are 2 ways to detect where rats and mice are

Innovative Fluorescent Tracking Gel is a specially formulated non-toxic fluorescent gel that can be applied to virtually all surfaces. The gel is applied to a surface where mice or rats are suspected. The gel does not dry out and when the rodents walk or climb over it, it sticks to their paws, belly and tail.

The rat or mouse then leaves a gel trail wherever the animal goes. The fluorescent gel glows when shined on with a UV-A(365nm) lamp, this gives a good indication of where traps or baits should be placed and helps to determine the correct methods of control and repulsion.

There are also special food cubes for rats / mice in these cubes is a fluorescent agent which eat the rats / mice then it is used the incontinence of rats / mice after eating the special food cubes they leave traces everywhere which are clearly visible under UV-A (365nm) light.

In this way, it can be determined where traps or feeding stations can best be placed.

Bed bugs

Bed bugs are considered parasites and can pose a health risk to many. Once you discover that your home is infested with bed bugs, the next crucial step is to identify their habitat to effectively eliminate them.

Because bed bugs hate light, it is difficult to find them during the day. Can you see bed bugs with UV-A(365nm) light? Well, with a UV-A lamp you can’t spot a bed bug directly, but a UV-A(365nm) lamp can be used to find their trail.

Try the following steps when using a UV-A(365nm) lamp to find traces of bed bugs:

If you remove your bedding, you will see the marks left by bed bugs.

If you want to find bed bugs with a UV-A(365nm) light, turn it on and check the corner seams of your mattress.

Follow the light across the seam until you see the glowing trace. Bed bugs leave a trail of blood and droppings. Follow this trail until you find the end.

If the bugs are not in the corner seams of the bed, they may be in the nearest wall seam or outlet. Suffocation and heat are the best ways to eradicate bed bugs once you find them.

30. Riboflavin wash cycle validation

UV-A(365nm) is used in combination with an aqueous solution of riboflavin to validate the wash sequence of containment isolators used to dose toxic/active products.

31. Hunting

UV-A(365nm) light can be used during hunting, a blood trail can easily be followed with a UV-A(365nm) lamp. Blood under UV-A(365nm) light is much darker than its surroundings and therefore a blood trail can easily be followed. Sweat can also be found, as it fluoridates under UV-A(365nm) light. Mushrooms This might not be so much a hunt as a search, but there are bioluminescent mushrooms that can easily be found with a UV-A(365nm) lamp.

32. Entomology

There are species of insects that light up under UV-A(365 nm). So an entomologist can use a UV-A(365nm) lamp in his research on insects.
A well known example of this are scorpions, certain species of scorpions light up under UV-A(365nm) light.

Intro

This article was compiled by Firstelementsstore.com to create as complete an overview as possible for the possible uses of a UV-A torch.
We have done our best to gather as much information as possible on this subject and put it together.
This piece is intended to inform and inspire you in the field of UV-A(365nm) technology.

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Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer an unprecedented UV-A(365nm) light output!

POWERLIGHT flashlights are the most powerful UV-A flashlights available on the world market!

Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer unprecedented UV-A(365nm) light output!

POWERLIGHT flashlights are the most powerful UV-A flashlights available on the world market!

Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer unprecedented UV-A(365nm) light output!

POWERLIGHT flashlights are the most powerful UV-A flashlights available on the world market!

Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer an unprecedented UV-A(365nm) light output!

POWERLIGHT flashlights are the most powerful UV-A flashlights available on the world market!

Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer unprecedented UV-A(365nm) light output!

POWERLIGHT flashlights are the most powerful UV-A flashlights available on the world market!

Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer unprecedented UV-A(365nm) light output!

POWERLIGHT flashlights are the most powerful UV-A flashlights available on the world market!

Looking for a professional real UV-A flashlight? POWERLIGHT flashlights offer unprecedented UV-A(365nm) light output!