Ultraviolet light: the formula for disinfecting hospitals

One of the most important things in hospitals is hygiene. All of the surfaces have to be more than clean so that there is no possibility for bacteria or germs to grow. But this isn’t always as easy as it seems. Because with “normal” tools like vacuum cleaners, swabs or brooms it’s impossible to handle this kind of contamination.

These adversed species can only be fought with modern methods just like ultraviolet light. Among the different ranges of the UV light it has become clear that the UV-C light is the most effective cone.

Ultraviolet light for disinfection

Even though it might surprise that the ultraviolet light is extremely efficient for disinfecting and sterilizing there is a simple explanation to it:

The UV light consists of a kind of electromagnetic radiation which again is stronger than the radiation of the visible light although not as strong as x-rays.

Depending on the wavelength there are three types of UV light:




Knowing this, it’s also necessary to know about the capacity of some molecules of the DNA of the microorganisms to absorb some wavelengths while being more sensitive to others.

In a study, conducted by the Carlos III Health Institute, it was proven that the radiation emitted by UV-C light is able to destroy the DNA and RNA of those minuscule organisms.

That is to say if the inactivation of the pathogens on the surface to be eliminated is proportional to the doses of UV-C radiation applied.

Another thing to be aware of is that the doses applied might change depending on the type of pathogen desired to eliminate as well as the environmental conditions such as humidity e.g.

Origin of the ultraviolet light

The discovery of the UV light was owed by the physician Johann Wilhelm Ritter who dealt with it in the beginning of the 19th century.

To be precise, the discovery was made by him noticing the invisible radiation beyond the visible violet spectrum being very effective in chemical reactions with some materials.

This is why the ultraviolet rays were called deoxidizing rays initially.

It was not until the 20th century that the name changed into how we call it today: ultraviolet.

Thanks to later studies it is known now that some substances react within the presence of fluorescence.

Like mentioned before, depending on the wavelength there are specific characteristics and different denominations:

UV-A rays: these rays are nearest to the visible light spectrum and commonly known for their use in beauty treatments or within the field of dermatology. Also known as black light.

UV-B rays: they’re emanating from the sun and being diluted by the ozone while entering the atmosphere; therefor its reach is minimal. UV-B rays cause melanomas and other types of skin cancer. Nowadays, it’s rather out of use.

UV-C rays: these rays with the purpose of disinfection and sanitizing destroy the DNA and RNA in such an effective way that they are ideal for getting rid of all the unwanted microorganisms, germs and bacteria. They are generated artificially, meaning that they don’t have to enter the stratosphere. They can be used on solid surfaces as well as in water or in the air.

Yet, it is recommendable to clear out any area in which the use of UV-C rays is being considered, e.g. in ventilation systems, just for protection.

UV-C luminaires

Here at NTE we offer different types of UV-C luminaires which perfectly adapt to the hospitals needs of constantly fighting germs.

Our professionals will be happy to counsel you regarding its different characteristics and application possibilities. Our client’s satisfaction is the most important to us.

Entradas Relacionadas

12 de November de 2021

Visit us Hall 4.1 Stand H51

ECOLOGÍA Y NUEVAS TECNOLOGÍAS S.L. NTE will be present as an exhibitor in Frankfurt, at the world’s leading lighting fair LIGHT + BUILDING from March 13 to 18, 2022 at Stand...
Sistemas de iluminación LED Grow mostrando todos sus beneficios

15 de February de 2023

What is LED grow light and what are the advantages for my plants?

LED Grow light is a lighting technique specifically designed for horticulture. This technology uses light-emitting diodes (LEDs) to emit a specific light that is tailored to meet the needs of...

5 de May de 2022

Our new product catalogue 2022 is now available online

NTE Sistemas is pleased to present our new 2022 catalogue. It consists of a digital and printed version, and will be a fundamental tool for the promotion of our products...

16 de March de 2020


Dear customers and suppliers, Given the current situation and in line with the provisions approved by the Government of Spain in view of the expansion of COVID-19, from NTE we...

6 de September de 2019


ECOLOGÍA Y NUEVAS TECNOLOGÍAS S.L. will attend LIGHT MIDDLE EAST, the main exhibition fair, conferences and awards in the Middle East for lighting design and technology. Lighting manufacturers and system...
Iluminación de cruces peatonales

28 de January de 2023

Crosswalk illumination: Everything you need to know for guaranteeing the safety of the pedestrians

Pedestrian crossings are usually areas where lighting plays an essential role in ensuring pedestrian safety. In this post we are going to review the essential aspects when it comes to...