What is continuous disinfection of visible light illumination? It uses illumination at the blue end of the visible spectrum to kill bacteria in hospitals and other spaces.
Why is this important? Almost one-third of inpatients are caused by health care-associated infections. If the technology is accepted by medical service providers, it will open a huge market for the lighting industry.
Is this new? Although this technology has attracted a lot of interest in the field of lighting, there has been a major breakthrough 20 years ago, when Strathclyde University in Glasgow, Scotland, discovered that a tuned lighting system can Kill the hospital's super bacteria, including MRSA and C. difficile.
About four years ago, the lighting system tested in the intensive care unit at the Royal Hospital in Glasgow, England, has been shown to kill super bacteria, including MRSA, E. coli and C. difficile. The HINS-optical system was developed by the University of Strathclyde in the United Kingdom. It has a spectrum of 405 nm and a shorter wavelength, but it is slightly longer than ultraviolet light. Unlike ultraviolet light, it is still visible to human eyes. The system has a purple hue, but the research team combined LED technology to produce a formal hospital lighting warm white lighting effect.
How does it work? The energy of short-wave UV-C LEDs kills most pathogens almost instantaneously, but this spectrum from 100-280 nm also kills healthy cells and is dangerous to human eyes and other organs. . Longer wavelengths of light take longer to kill bacteria, but they can be used together when there are people on site. The narrow spectrum of visible light excites molecules to produce a chemical reaction that kills bacteria from the inside as if a bleach was released from the bacterial cells.
The operating room may be one of the main application areas for continuous disinfection using visible light illumination.
What is the best wavelength? Different manufacturers use different wavelengths, Current uses the 300-380nm range, but most of the focus is concentrated at 405 nm. A study by the University of North Carolina found that three major bacteria (MRSA, VRE, MDRA) were inactivated at 405 nm on surfaces with a contact time of 1 to 96 hours.
Does it look different from normal lighting? Narrow-band LEDs can be integrated into ordinary warm white fixtures, so they look like standard LED panels.
Where is it used? It is currently used in some medical institutions and some hospitals in the United States, and it works well. For example, the Maury Regional Medical Center in Columbia, Tennessee, found that after a year and a few months, bacteria in the operating room were reduced by 85% and the number of surgical site infections was reduced by 73%. The technology is also entering the ambulance due to a licensing agreement between Vital Vio and emergency vehicle manufacturer Code 3.
Who are the main players? Hubbell Lighting, Kenall (both using the technology licensed by the University of Strathclyde), Vital Vio (connected with Rensselaer Polytechnic Institute), Acuity (using the Vital Vio patent), GE Current (internal technology).
Hubbell Lighting of the United States launched LED-based continuous disinfection technology at LightFair International this year. John DiNardi, general manager and vice president of Hubble Lighting Components, said the company will be positioned such as changing clothes. Applications such as rooms, and this technology is called high-intensity narrow-spectrum (HINS) lighting.
Current is currently the first company to plan to use UV for continuous disinfection. It is also on display at the International Lighting Show in the United States. Current says its products will shine in the 300-380nm range. Current or focus on UV-A technology for medical treatment. Central application.
Vital Vio, a healthcare solutions company that uses its patented VioSafe white light disinfection technology, recently announced another patent for its innovative white light disinfection LED technology.
Editor: Yan Zhixiang
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