SDI Lamps Our actinic Super Diazo lamps come in many lengths, wattage, and diameters to cover the individual designs and applications of our OEM clients.

ultraviolet中文

Near UVregion

There are two basic types of commercially viable lamps that provide the UV-C necessary to be germicidal.  We define commercially viable as systems or lamps that provide the necessary UV-C light intensities and dosages that are actually able to disinfect larger areas and surfaces. There are other light sources of UV-C, such as LED, that do provide ultraviolet light in the necessary germicidal wavelengths of 100nm to 280nm, but they are not currently able to provide the intensity of light needed to disinfect surfaces.

uvlight是什么

As mentioned, UV light with wavelengths less than 290nm are considered to have “germicidal” properties, meaning it can kill germs. This kind of light is commonly used to kill microbes on surfaces, in air, and in water.

UVGI has been recommended or used for the isolation of disease and bio-defense systems for buildings by the United States Army, the CDC, and the Federal Emergency Management Agency (FEMA).

Need specifications? Download our Common Black Light & BLC Lamp Configurations today and please contact us if you have any questions.

UV light

After confirming UV lighting’s ability to kill pathogens, the next step was to find a way to replicate the UV wavelengths that would result in the disinfection of surfaces, air, and water. The first UV quartz lamp was invented in 1904 and resulted in the germicidal lamp. Germicidal lamps are a type of lamp that produce the wavelengths of ultraviolet light (UV-C; 200nm to 280nm) that have disinfection properties, like the ones used in this study to reuse N95 masks during the coronavirus pandemic.

The disinfection properties of ultraviolet lighting have been known for over 140 years, since Downes and Blunt discovered the antibacterial effects of the shorter wavelengths of sunlight. Shortly thereafter, it was proven that the UV portions of the light spectrum were able to destroy microorganisms.

Our low pressure and medium pressure UV lamps are used in worldwide applications for industrial curing of adhesives and resins, inks, bonds, finishes (lacquers, glazes and varnishes), and more. Compared to heat curing, UV curing has fewer maintenance costs and does not produce noxious fumes.

Far-UV region

Ultraviolet light kills cells by damaging their DNA. Exposure to the electromagnetic radiation (light) at certain UV wavelengths modifies the genetic material of microorganisms and destroys their ability to reproduce. The UV energy triggers the formation of specific thymine or cystosine dimers in DNA and uracil dimers in RNA, which causes the inactivation of microbes by causing mutations and/or cell death as well as failure to reproduce. (source)

It is important to understand the difference between sterilization, disinfection, and decontamination as these terms are often incorrectly used interchangeably, which can cause confusion in regards to the effectiveness of UVGI (as well as the avoidance of potential legal ramifications).

Ultraviolet light (UV) is a type of naturally present electromagnetic radiation that is in sunlight and actually makes up approximately 10% of the total light generated by the sun. UV light is electromagnetic energy with wavelengths shorter than visible light but longer than x-rays (see image below).

The effectiveness of germicidal UV light depends on the length of time a microorganism is exposed to UV, as well as the intensity and wavelength of the UV radiation.

VacuumUVregion

Near UVand farUVrange

UV light with wavelengths less than 290nm are considered to have “germicidal” properties (more on this below). Earth’s atmosphere absorbs ultramagnetic radiation with wavelengths less than 290nm, meaning that most of the UV-C and UV-B generated by the sun is blocked by our planet’s ozone.

Common Black Light & BLC Lamp Configurations UV curing uses UVA light in the wavelength range of 315nm to 400nm, with a peak at 350nm. UVA light is commonly referred to as black light, BL, BLC, BL9, TL/09, and BL350.

Per the CDC, disinfection and sterilization are essential for ensuring that medical and surgical instruments do not transmit infectious pathogens to patients. Because sterilization of all patient care items is not necessary, healthcare policies must identify, primarily on the basis of the items’ intended use, whether cleaning, disinfection, or sterilization is indicated.

uvlight中文

UVA and UVA-1 Lamps LCD Lighting offers a wide range of UVA and UVA-1 lamps in many lengths, wattage, and diameters to cover many specialty applications. Standard, HO and VHO outputs and reflector models are available.

According to this article from the Centers for Disease Control (CDC), “UV can kill all bacteria, including drug-resistant bacteria because UV light is actually attacking the DNA and RNA of microbes. While the amount of UV needed to kill a microbe may vary as there is a relationship between the size of DNA molecules and the effect of UV radiation, there have been no reports of microbes demonstrating an ability to build an immunity to light-based methods.”

Most of these lamps are sold as components in a complete disinfection system, or as linear/compact lamps. The types are:

The wavelength of this light ranges from 10nm to 400nm and is classified into three sub-bands; UV-A (near), UV-B (middle), and UV-C (far).

In summary, UVGI is a method of disinfection that uses short wavelength ultraviolet light (UV-C) to inactivate or kill microorganisms and pathogens. Essentially, UVGI decontamination is the use of UV light with sufficiently short wavelengths to disinfect surfaces, air, and water.

SDI lamps emit radiation over the light spectrum of 370nm to 475nm, with a peak at 420nm. These lamps have long been the standard in the printing industry. SDI is commonly called TL/03 and actinic.  Curing uses include silk screening, platinum printing, diazo polymerization, chemical processing, mineral detection, and photobiology/aquariums.

UVA-1 emits UVA light in the wavelength of 350 to 400nm, with a peak between 367 to 369nm. UVA-1 is also known as BLC, BL9, TL/10, and BL367.  Typical applications for UVA-1 are screen printing and flexograph platemaking applications, polymerization, medial and biomedical applicaitons.