Usage of Germicidal UVC Lamps

Published Date: 2023-06-20 09:52:59 Views: 251

In addition to the usual masks, alcohol, and goggles for dealing with COVID-19, germicidal UV lamps are an effective way to protect against the disease.

Strongest disinfection effect in the deep UV band

UV disinfection and sterilization is an ancient and proven method. Drying quilts and clothes in the sun is one of the most primitive ways of using UV light to remove mites, sterilize and disinfect.

The principle of UV disinfection and sterilization is to use high-energy UV light to disrupt the DNA double helix chain, affecting their replication and propagation, thus achieving the inactivation of bacteria and viruses. Of course, to achieve effective disinfection, UVC still needs to meet certain requirements, pay attention to the wavelength of the UVC light source, irradiation dose, and irradiation time, i.e. it must be a wavelength of 280nm below the UVC band of deep ultraviolet light, for different bacteria and viruses to meet certain irradiation dose and irradiation time, otherwise, it can not effectively inactivate bacteria and viruses.

uvc lamps

According to the wavelength, the UV band can be divided into UVA, UVB, and UVC bands. UVC is the shortest wavelength and the highest energy band. In fact, the most effective wavelength for disinfection is UVC, which is known as the deep ultraviolet band. The advantage of UVC over chemical disinfection is that it is highly effective and inactivation is usually completed within a few seconds, and no other chemical contaminants are produced.

UV light does not only inactivate bacteria and viruses but also microorganisms. It can be used in a variety of applications, from purifying water in the home by installing a UV water purification system to sterilizing bacteria floating in the air with an air purifier equipped with a UV lamp. In addition, UV lamps can be used to sterilize water in sewage treatment plants, food factories, breweries, and beverage factories.

Tips for using UVC germicidal lamps

Due to the destructive effect of UVC on biological cells, care should be taken when using UVC germicidal lamps not to irradiate directly onto human skin, and not to look directly into the lamp with your eyes.

How to use UVC germicidal lamps scientifically and effectively under the premise of ensuring safety? We recommend paying attention to where the UVC lamp is placed to create the best environment for use, as well as the length of time it is used.


  1. As UV light penetrates very weakly in the air, it is difficult to achieve long-distance sterilization capability, so when using it, try to place it in the main sterilization location, such as the middle of the room, or where bacteria tend to breed, 1.5m-2m away from the surrounding area is best.
  2. When using it, you should pay attention to the impact of the environment on the germicidal effect. Usually, the temperature is between 27°C and 40°C and the output intensity of the UVC is the highest and the germicidal effect is the best. In addition, ensure that the environment is clean and dry. A large amount of moisture and dust in the environment will interfere with and weaken the effect of UV light, reducing the actual intensity of UV light. When using at home, try to keep doors and windows closed, draw curtains and turn off lights to ensure that the room is in darker conditions, which is more conducive to the germicidal effect of UVC. For areas prone to bacteria and other micro-organisms, such as quilts, you can spread the quilts to increase the contact area, which is more conducive to UV sterilization.
  3. UVC germicidal lamps in use should ensure sufficient exposure time. Research shows that an irradiation time greater than 5 minutes, for effective germicidal disinfection time; when the irradiation time is > 30 minutes, it can achieve the daily disinfection effect; when the irradiation time reaches 60 minutes, it can kill the vast majority of bacteria, viruses, etc. in the air.

Currently, the main source of deep UV light for disinfection and germicidal applications in the civil and industrial sectors is the mercury lamp. In the future, deep UVC LEDs based on gallium nitride broadband semiconductor materials are expected to replace traditional mercury lamps, and their applications are more likely to be extended to portable disinfection electronics, such as mother and baby disinfectors, lift handrail sterilizers, mini washing machines with built-in UV germicidal lamps, floor sweeping robots, etc.

In short, in the face of COVID-19, the use of UV germicidal lamps for sterilization must be scientifically and reasonably regulated, and great importance should be attached to safety in use.

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