Far-UVC light (222nm) destroys viruses, bacteria, and fungi in occupied spaces without harming people. The science, the products, and the future of clean air.
Far-UVC light operates at 222 nanometers wavelength — a narrow band of ultraviolet light. Unlike conventional UV-C (254nm), which damages human skin and eyes, far-UVC at 222nm is absorbed by the outer dead-cell layer of skin and the tear layer of eyes before reaching living cells. It kills pathogens but doesn't harm people.
UV light at 222nm breaks the molecular bonds in viral and bacterial DNA/RNA, destroying their ability to replicate. Effective against: SARS-CoV-2, influenza, MRSA, tuberculosis, norovirus, and most other airborne and surface pathogens. Studies show 90-99.9% inactivation rates.
Columbia University, Kobe University, and dozens of institutions have published peer-reviewed studies confirming safety at recommended exposure levels. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) and the American Conference of Governmental Industrial Hygienists (ACGIH) have set exposure limits. Far-UVC at 222nm meets these standards for continuous human exposure.
Conventional UV-C (254nm) is used in empty rooms and HVAC systems — it works but can't be used with people present. Far-UVC (222nm) can be used in occupied spaces because the shorter wavelength can't penetrate living skin or eye cells. This is the breakthrough.
Hospital rooms, waiting areas, surgical suites, dental offices. Continuous air and surface disinfection while patients and staff are present. Reduces hospital-acquired infections (HAIs), which affect 1 in 31 hospital patients and cost $28-45 billion annually in the US.
Classroom and office ceiling fixtures provide continuous disinfection. Reduces absenteeism from respiratory illness. Studies suggest far-UVC could reduce airborne pathogen transmission by 90%+ in typical indoor spaces. The cost: $200-500 per fixture.
Buses, trains, airplanes, ride-shares. Enclosed spaces with high passenger turnover are ideal for far-UVC. Some transit systems are already testing ceiling-mounted units. Airlines are evaluating for cabin use during flights.
Surface disinfection for food processing, restaurant prep areas, and grocery stores. Kills bacteria on surfaces without chemicals. No residue, no rinse required. FDA evaluation ongoing for direct food surface application.
Care222 technology. The pioneer. Filtered excimer lamp ensuring pure 222nm output. Used in studies worldwide. Commercial fixtures for ceiling mount. The gold standard in far-UVC. Partnered with multiple fixture manufacturers.
US-based. Krypton chloride (KrCl) excimer lamps. Commercial and residential fixtures. Focus on schools and healthcare. Growing product line for different room sizes and ceiling heights.
Champaign, Illinois. Developing next-generation far-UVC sources. Flat-panel form factors. Working on cost reduction for mass adoption. Academic collaborations with major research universities.
Do NOT attempt to build far-UVC fixtures without proper filtration. Unfiltered KrCl lamps emit dangerous wavelengths alongside 222nm. Only use certified, filtered commercial products. The filter is what makes it safe. No filter = conventional UV-C danger.