How Well You Understand UV, UVC, & Ultraviolet Lights?

UV & UVC – these names have become a significant part of the secured internal environment in terms of lighting that plays a vital role in disinfecting germs existing in the air, and the environment. This is the reason either UVC lamp, or ultraviolet disinfection lamp, are widely used in health care commercial departments including hospital, clinics, in high profile industrial sectors to provide safe breathing environment, and in residential places as well.

Do you know what UV lighting is? Let’s clear the concept of ultraviolet, and UVC lighting/lamps

What is Ultra Violet Lamp?

Ultraviolet light/lamp – also known as Black-light Lamp, is a device that is used for producing electromagnetic radiations in the wavelengths between those X-rays and visible lights. The Sunrays are rich in such radiation; they’re also referred to as black light at times as it isn’t visible to the singlehanded eye.

The ultraviolet lamp typically consists of an electric discharge lamp with material that produces radiations required wavelength. The ultraviolet lamps are usually kept in quartz or special glass which transfers ultraviolet radiation more voluntarily, unlike ordinary glass.

Many particular features and specifications are considered when approached by any leading ultraviolet lamp supplier for any serious application.

What UV – Ultra Violet lighting is?

The ultraviolet or UV lighting is a kind of naturally present electromagnetic radiation that exists in sunlight and makes up around 10% of total light generated by the sun. The UV light is electromagnetic energy with shorter wavelengths as compared to visible light, yet no longer than x-rays

The wavelength of this light ranges somewhere around 10nm to 400nm, and is divided into three sub-bands;

  1. UV-A (near)

  2. UV-B (middle)

  3. UV-C (far)

UV light that has wavelengths less than 290nm are usually known as “germicidal” properties. Ground’s atmosphere absorbs ultra-magnetic radiation shorter wavelengths, this means most of UV-C and UV-B produced by the sun is blocked by our planet’s ozone.

What is UV Disinfection lighting?

As mentioned, UV light with wavelengths less than 290nm is considered to have “germicidal” properties, this indicates it can kill germs. The UVC disinfection lamps are made with the use of material or cutting edge technology that works in killing all tiny microbes in air, surfaces, and water

How does UV disinfection light work?

The ultraviolet light attacks bacteria / microbes DNA, and thus kill all germicidal cells. When electromagnetic radiation lights are exposed at certain UV wavelengths, this modifies the genetic material of microorganisms, and destroy its ability to reproduce

The UV energy triggers the arrangement of explicit thymine or cytosine dimers in DNA and uracil dimers in RNA, which causes the inactivation of microorganisms by causing changes and additionally cell passing just as bombs the proliferation cycle

As claimed by Centers for Disease Control (CDC), “UV is powerful enough to kill all bacteria involving the drug-resistant bacteria since the UV light attacks DNA and RNA of microbes.

What particular lamp types provide UV-C disinfection lighting?

There are two basic types of commercially viable lamps which provide UV-C that is a must for germicidal. The commercially viable is a term used for describing lamps that provide basic UV-C light powers and which can sterilize larger surfaces and areas

Besides, there are some other UVC light sources such as; LED, which also use ultraviolet light in required germicidal wavelengths of 100nm to 280nm, yet not able to provide that light intensity which disinfects surfaces.

The majority of these lamps are supplied as components in a complete disinfection system, or as compact lamps. Those specific types are;

Low-Pressure Mercury Lamps

The low-pressure mercury lamps are just like conventional fluorescent lamps in form and shape. However, the UV-C lamps are often made of fused quartz in contrast to borosilicate glass and lack fluorescent phosphor

This enables light produced by the mercury arc within the lamp to pass out of unmodified glass, producing light within a germicidal ultraviolet wavelength.

Pulsed Xenon

The pulsed Xenon arc lamps kind of gas discharge lamp which produces light by passing electricity via ionized xenon gas. It often uses flashes which hardly lasts for few milliseconds of germicidal ultraviolet light after every six seconds or a similar time period

The pulsed UV light systems like; pulsed xenon can combine germicidal effects of UV-C lighting with thermal disintegration of cell walls from the intensity, and speed of photonic delivery.

So, we must check when buying any of lamp type from UVC lamp manufacturer, which type they usually in the market

How Can Clinics & Hospitals Be Disinfected with UVC Lamps?

The rich infectious microbial and viral disease can be marked as a major challenge to global health, and, as such, also a critical risk to worldwide financial stability and security.

To sterilize the dental operatories when the patients, numerous conventions have been talked about including –

straightforward just characteristic ventilation with min. 6 air changes for each hour (ACH) of 60 min

    • HEPA 13/14 air channels with min 12 ACH
    • Disinfectant defogging of 30-45 min or
    • Ultraviolet germicidal illumination (UVGI) in addition to the ventilation of 2 min to 6 hours relying on the wattage of the light source, room size, and UV light situation in the room


Among these various kinds, UV-C purification has picked up kindness because of its adequacy against an expansive scope of microbial and viral specialists in an assortment of conditions.