Electromagnetic radiation comes from the sun and transmitted in waves or particles at different wavelengths and frequencies. This broad range of wavelengths is known as the electromagnetic (EM) spectrum. The spectrum is generally divided into seven regions in order of decreasing wavelength and increasing energy and frequency. The common designations are radio waves,microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma-rays.

According to Robert Patterson, a professor of astronomy at Missouri State University, most observations are conducted using charge-coupled devices (CCD), detectors designed to be sensitive to short-wavelength photons. These observations can determine the surface temperatures of the hottest stars and reveal the presence of intervening gas clouds between the Earth and quasars.

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The result is skin cancer, the most common form of cancer in the United States. People who get sunburned repeatedly are at much higher risk. The risk for the deadliest form of skin cancer, called melanoma, doubles for someone who has received five or more sunburns, according to the Skin Cancer Foundation.

LED Microscope Lighting Safety and the Environment: There is no denying that mercury is hazardous, unlike LEDs. LEDs are also more energy efficient, emit much less heat and are in many ways better for the environment.

Most of the natural UV light people encounter comes from the sun. However, only about 10 percent of sunlight is UV, and only about one-third of this penetrates the atmosphere to reach the ground, according to the National Toxicology Program (NTP). Of the solar UV energy that reaches the equator, 95 percent is UVA and 5 percent is UVB. No measurable UVC from solar radiation reaches the Earth's surface, because ozone, molecular oxygen and water vapor in the upper atmosphere completely absorb the shortest UV wavelengths. Still, "broad-spectrum ultraviolet radiation [UVA and UVB] is the strongest and most damaging to living things," according to the NTP's "13th Report on Carcinogens."

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If you’re not sure whether a CoolLED Illumination System is right for you, we can provide a free loan unit for testing, with no obligation to purchase. Please contact us at [email protected] for more information.

A suntan is a reaction to exposure to harmful UVB rays. Essentially, a suntan results from the body's natural defense mechanism kicking in. This consists of a pigment called melanin, which is produced by cells in the skin called melanocytes. Melanin absorbs UV light and dissipates it as heat. When the body senses sun damage, it sends melanin into surrounding cells and tries to protect them from sustaining more damage. The pigment causes the skin to darken.

Polarization is a phenomenon that is observed in certain electromagnetic radiations, including light waves. In a polarized light wave, the direction and ...

Recent research suggests that UV light may have played a key role in the origin of life on Earth, especially the origin of RNA. In a 2017 article in the Astrophysics Journal, the authors of the study note that red dwarf stars may not emit enough UV light to start the biological processes needed for the formation of ribonucleic acid, which is necessary for all forms of life on Earth. The study also suggests this finding could help in the search for life elsewhere in the universe.

UV radiation has enough energy to break chemical bonds. Due to their higher energies, UV photons can cause ionization, a process in which electrons break away from atoms. The resulting vacancy affects the chemical properties of the atoms and causes them to form or break chemical bonds that they otherwise would not. This can be useful for chemical processing, or it can be damaging to materials and living tissues. This damage can be beneficial, for instance, in disinfecting surfaces, but it can also be harmful, particularly to skin and eyes, which are most adversely affected by higher-energy UVB and UVC radiation.

LEDs and LED microscope lighting have come a long way since they were first developed for microscopy in 2006. The wealth of benefits compared to traditional microscope lighting such as mercury and metal halide lamps are driving more and more scientists towards this efficient, highly controllable technology.

We also understand that something out of the ordinary is sometimes required, and manufacturers wishing to gain a competitive advantage can now access our world-renowned LED technology in customised configurations at www.OEMIllumination.com.

It may seem counterintuitive to treat skin cancer with the same thing that caused it, but PUVA can be useful due to UV light’s effect on the production of skin cells. It slows down the growth that plays a major role in the disease’s development.

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While exposure to UV light can lead to skin cancer, some skin conditions can be treated using UV light, according to Cancer Research UK. In a procedure called psoralen ultraviolet light treatment (PUVA), patients take a drug or apply a lotion to make their skin sensitive to light. Then a UV light is shone on the skin. PUVA is used to treat lymphoma, eczema, psoriasis and vitiligo.

In fluorescent tubes used for lighting, "ultraviolet radiation with a wavelength of 254 nm is produced along with the blue light that is emitted when an electric current is passed through mercury vapor," according to the University of Nebraska. "This ultraviolet radiation is invisible but contains more energy than the visible light emitted. The energy from the ultraviolet light is absorbed by the fluorescent coating inside the fluorescent lamp and re-emitted as visible light." Similar tubes without the same fluorescent coating emit UV light that can be used to disinfect surfaces, since the ionizing effects of UV radiation can kill most bacteria.

Many substances — including minerals, plants, fungi and microbes, as well as organic and inorganic chemicals — can absorb UV radiation. Absorption causes electrons in the material to jump to a higher energy level. These electrons can then return to a lower energy level in a series of smaller steps, emitting a portion of their absorbed energy as visible light. Materials used as pigments in paint or dye that exhibit such fluorescence appear brighter under sunlight because they absorb invisible UV light and re-emit it at visible wavelengths. For this reason they are commonly used for signs, safety vests and other applications in which high visibility is important.

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LED Microscope Lighting Control: Unlike mercury and metal halide lamps which require mechanical shutters, electronic control of LEDs is simple and fast. The ability to switch them on and off with precise microsecond timing is perfect for capturing high-speed events, and electronic modulation of irradiance means no more neutral density filters.

Black-light tubes typically use mercury vapor to produce long-wave UVA light, which causes certain dyes and pigments to fluoresce. The glass tube is coated with a dark-purple filter material to block most of the visible light, making the fluorescent glow appear more pronounced. This filtering is not needed for applications such as disinfecting.

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CoolLED LED lighting systems are renowned for being robust and reliable. In fact, we recently heard from a customer who purchased one of our first ever products on the market, and who told us: “Our precisExcite is working in a fantastic manner for over 10 years. It has already contributed to more than 10 publications from the lab and will continue to do so.” – Charles Harata, Associate Professor, Department of Molecular Physiology & Biophysics at the University of Iowa

The guide goes on to state, "Radiations with wavelengths from 10 nm to 180 nm are sometimes referred to as vacuum or extreme UV." These wavelengths are blocked by air, and they only propagate in a vacuum.

LED Microscope Lighting Cost: In addition to saving on components, the longer lifetime of LEDs is cheaper in the long-term. You also avoid specialist disposal charges due to the high-pressure lamp and mercury content. Take a look at this study by Green Light Laboratories.

One of the most common ways of producing UV light is passing an electric current through vaporized mercury or some other gas. This type of lamp is commonly used in tanning booths and for disinfecting surfaces. The lamps are also used in black lights that cause fluorescent paints and dyes to glow. Light-emitting diodes (LEDs), lasers and arc lamps are also available as UV sources with various wavelengths for industrial, medical and research applications.

Besides the sun, there are numerous celestial sources of UV radiation. Very large young stars shine most of their light in ultraviolet wavelengths, according to NASA. Because Earth's atmosphere blocks much of this UV radiation, particularly at shorter wavelengths, observations are conducted using high-altitude balloons and orbiting telescopes equipped with specialized imaging sensors and filters for observing in the UV region of the EM spectrum.

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Ultraviolet light is a type of electromagnetic radiation that makes black-light posters glow, and is responsible for summer tans — and sunburns. However, too much exposure to UV radiation is damaging to living tissue.

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A number of artificial sources have been devised for producing UV radiation. According to the Health Physics Society, "Artificial sources include tanning booths, black lights, curing lamps, germicidal lamps, mercury vapor lamps, halogen lights, high-intensity discharge lamps, fluorescent and incandescent sources, and some types of lasers."

But if things do occasionally go wrong, we are there to offer local support through our global network of resellers and Global Sales Team, which means there is always an expert available to help.

Our systems are dedicated to enhancing data generation and interpretation for researchers and clinicians through generating bright, high-contrast images. Unlike standard LEDs, our unique active cooling technology and expert LED assembly enables irradiance levels up to five times greater than other LED microscope lighting options. Thermal management holds the LEDs at a constant temperature, allowing us to drive them more powerfully. This increases irradiance, stability, reliability and lifetime, while offering the lowest energy consumption on the market. CoolLED is also the only company to provide direct fit products as an alternative to light delivery with a liquid light guide. This is the most efficient means of light delivery to a microscope and is our most popular type of LED microscope lighting solution. It harnesses more power, while also reducing total cost of ownership thanks to fewer consumables.

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LED Microscope Lighting Convenience: LEDs are long-lived and don’t require tricky alignment. Once you switch them on they are ready to be used.

Sometimes the cells with DNA mutated by the sun's rays turn into problem cells that don't die but keep proliferating as cancers. "The UV light causes random damages in the DNA and DNA repair process such that cells acquire the ability to avoid dying," said Chuang.

We have a record of >99% on-time delivery in full against acknowledged delivery dates and we pride ourselves on friendly and expert advice whenever it is needed. You will also be covered by our market-leading warranty, which includes three years as standard for all products and a 12 month in-for-out swap if we cannot fix an issue.

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Since 2006 when our team of four launched the first commercially available LED illumination system, we have led the way in transforming light source technology. We cover fluorescence microscopy and transmitted light applications, backed by our technical know-how and unique blend of optical engineering and life science expertise.

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Spectrophotometry in its biochemical applications is generally concerned with the ultraviolet (UV, 185-400 nm), visible (400-700 nm) and infrared (700-15 000 ...

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Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays. It has frequencies of about 8 × 1014 to 3 × 1016 cycles per second, or hertz (Hz), and wavelengths of about 380 nanometers (1.5 × 10−5 inches) to about 10 nm (4 × 10−7 inches). According to the U.S. Navy's "Ultraviolet Radiation Guide," UV is generally divided into three sub-bands:

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LED illumination systems are cleaner, have a long lifetime and use less power. Our pE-300 Series is also ACT label certified and is a natural choice for labs who want to play their part in helping the environment.

Did you know that LED illumination systems help laboratories reduce their carbon footprint, protecting laboratory staff along the way?

"Melanin is a natural sunscreen," Gary Chuang, an assistant professor of dermatology at Tufts University School of Medicine, told Live Science in a 2013 interview. However, continued exposure to UV radiation can overwhelm the body's defenses. When this happens, a toxic reaction occurs, resulting in sunburn. UV rays can damage the DNA in the body's cells. The body senses this destruction and floods the area with blood to help with the healing process. Painful inflammation occurs as well. Usually within half a day of overindulging in the sun, the characteristic red-lobster look of a sunburn begins to make itself known, and felt.

Toxic mercury-based microscope illuminators are bad news for the environment, draw a lot of power and have a short lifetime.

CoolLED is a fast-growing organisation based in the UK. We draw on the latest technology to design and manufacture a vast range of cutting-edge LED microscope lighting solutions for researchers and clinicians.

Whether using fluorescence or transmitted light, or a compound or stereomicroscope, high-quality science begins with high-quality microscope components – including the light source.

LED Microscope Lighting Performance: Being solid-state, LEDs are much more stable over time, leading to a robust level of irradiance and highly repeatable experiments.

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For manufacturers who wish to gain a competitive advantage through bright, stable and controllable illumination, CoolLED’s world-renowned LED technology is available in customised configurations.

A range of LED lighting products are available with a variety of LEDs and different levels of control. Single wavelength models are ideal for screening applications, and simple white light options are the perfect replacement for a mercury/metal halide lamp. For controllable, everyday fluorescence, the pE-300 Series offers three wavelengths covering all the common fluorophores. Our range extends to the high-end pE-4000 LED microscope lighting solution which offers 16 wavelengths, spanning 365 nm-770 nm. This can excite in the UV region and right through to fluorophores at the IR end of the spectrum (which is ideal for imaging thick samples while protecting against phototoxicity). This even opens up the development of new fluorophores which no longer depend on the emission spectrum of a mercury/metal halide lamp.

Fluorescence can also be used to locate and identify certain minerals and organic materials. According to Thermo Fisher Scientific, Life Technologies, "Fluorescent probes enable researchers to detect particular components of complex biomolecular assemblies, such as live cells, with exquisite sensitivity and selectivity."

LED lighting systems are available for fluorescence microscopy and transmitted light applications. Take a look at our product range to discover which system is best suited to your requirements.

Ultraviolet lamps that perform a variety of analytical and sterilizing functions as well as accessories and replacement parts for UV lamps.