Scientifically proven efficacy of blue light

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There are currently over 2000 peer-reviewed scientific articles on the efficiency of blue light in eliminating different microbes.

Laboratory tests against viruses: SARS-CoV-2 and Influenza A

New 2021 September: Visible blue light has been shown to inactivate viruses such as SARS-CoV-2 and Influenza A. Read the whole article here. 

Laboratory tests against most common causes of Healthcare-Associated Infections

E. Coli - Number #1 in Healthcare-associated infections (HAIs)

Spectral Blue test results vs. E.Coli bacteria (2020)

E.Coli is the most common cause of hospital acquired infections in Europe (15,9%, ECDC 2012).

In summer 2020, laboratory tests were conducted at the FINAS accredited MetropoliLab to determine the efficiency of LED Tailor’s photon disinfection devices in inactivation of E.Coli (ATCC 25922).

The bacteria were spread out on the bottom of plastic petri dish and irradiated with low density blue light (0,7mW/cm2) under regular office conditions. Each test result contains three parallel samples from each point of analysis. Error bars show SD (Standard deviation).

2-hour irradiation resulted in reduction of over 99,9% (over 3 log10).

Already after 30 min the reduction was 99% (2 log10).

Blue light vs. other most common causes of Hospital-acquired infections (HAIs)

The below table lists the most common causes of healthcare-acquired infections in Europe, according to the European Centre for Disease Prevention and Control (ECDC). The ECDC conducted a study from 2011–2012 on vectors of healthcare-associated infections in 273,753 patients in 1,149 hospitals in 29 European countries.

Most common causes of healthcare-associated infections (HAIs) [ECDC, 2012]

The table also contains data on the efficiency of blue light inactivation of microbes collected from different sources. Although different microbes respond differently to blue light, it is nevertheless fatal to all of them.

Links to review articles on the topics

Please note that some of the articles may require a paid subscription or one-time purchase. The article licenses do not allow us to share them online.

How blue light affects microbes:

Wang, Y., Wang, Y., Wang, Y., Murray, C. K., Hamblin, M. R., Hooper, D. C., & Dai, T. (2017).
Antimicrobial blue light inactivation of pathogenic microbes: State of the art. Drug Resistance Updates.
https://doi.org/10.1016/j.drup.2017.10.002
https://www.sciencedirect.com/science/article/pii/S1368764617300420?via%3Dihub

Hessling, M., Spellerberg, B., & Hoenes, K. (2017).
Photoinactivation of bacteria by endogenous photosensitizers and exposure to visible light of different wavelengths - A review on existing data.
In FEMS Microbiology Letters.

https://doi.org/10.1093/femsle/fnw270
https://academic.oup.com/femsle/article/364/2/fnw270/2631358