The Dangers of Germicidal Lights

Indoor Air Pollution and Health Risks Associated with Germicidal Ultraviolet Lights

Devices that emit germicidal ultraviolet light have received commendation for their efficacy in eradicating airborne pathogens such as those responsible for causing COVID-19 and the flu. However, recent laboratory experiments indicate that these lights may also give rise to the production of compounds that pose potential hazards to human health.

The concern arises when the ultraviolet light reacts with oxygen, leading to the formation of ozone, which in itself presents a health risk. According to Jesse Kroll, a professor of civil and environmental engineering, the production of ozone can also result in various other oxidation reactions. This, in turn, can lead to the creation of fine particles and oxidised volatile organic compounds, which could potentially be more harmful to human health than their unoxidised precursors. Victoria Barber, who was involved in the research as an MIT postdoc and is now an assistant professor at UCLA, further emphasises the potential risk of these oxidants reacting with volatile organic compounds commonly found in indoor environments.

Despite the potentially significant role of germ-killing lights, the researchers emphasise the importance of using these devices in conjunction with appropriate ventilation, rather than as a substitute for it. This necessitates a judicious approach to the use of germicidal ultraviolet lights to minimise the risk of indoor air pollution and protect human health.

In conclusion, while germicidal ultraviolet lights have shown promise in reducing the spread of airborne pathogens, it is important to be mindful of the potential risks associated with their use. Employing these devices in a manner that prioritises both their effectiveness in pathogen eradication and the maintenance of indoor air quality is crucial for ensuring the safety and well-being of occupants in indoor spaces.

By staying informed about the potential risks and implementing the appropriate measures, it is possible to harness the benefits of germicidal ultraviolet lights while mitigating their potential downsides. This balanced approach will be essential for effectively managing the risk of indoor air pollution and ensuring the safety of indoor environments.