Healthcare lighting

Distilling Disinfecting Lighting Resources and Best Practices

Lauren-Schwade

Lauren Schwade, LC, EDAC, IES

Associate, Senior Lighting Designer
6/01/20

We’ve all been inundated with methods/resources on best cleaning and disinfecting practices that the healthcare industry can start utilizing TODAY. From appropriate cleaning products and procedures to types of filters and face masks that can be utilized, we’ve heard (and read) about it all… but, what about using light as a disinfection tool? Several companies in the market are claiming such products–lights with disinfecting capabilities. We’ve attempted to distill tips and guidelines–how to assess practices and products and how to apply it with today’s needs in response to COVID-19.

Ultraviolet light has germicidal properties at its core, but different wavelengths of light are used for different purposes. A few architectural lighting companies are currently offering safe germicidal wavelengths of light (in their architectural lighting products) in the near UV range, still in the visible spectrum. Those products range from ceiling troffers to downlights; they typically have an “always on” safe mode along with a higher intensity mode that should be saved for after-hours use only when rooms are unoccupied. The longer a light is left on, at a higher intensity, the greater the kill rate and decontamination of the room. NOTE: These architectural products were designed to add an additional level of disinfection in your healthcare environment (another tool in the kit) and not to replace existing cleaning protocols. Keep in mind, a ceiling mounted light may only disinfect surfaces below it, not under or around it. The surface material itself impacts the effectiveness of the disinfecting lights as well — if the material is more porous, has a coating or is soiled etc., it will influence how the light “cleans” the surface.

COVID-19 and other viruses like SARS and MERS are not as easy to kill, requiring a stronger, shorter wavelength of light, known as UV-C. This range of ultraviolet light is able to change the structure of DNA/RNA molecules deactivating viruses. This source of UV-C light, in the past, has only been made possible by using Mercury or Xenon light sources in primarily large and expensive pieces of medical equipment. This equipment is then moved around the room for disinfecting purposes, which can be a significant hassle for facilities. LEDs are giving our healthcare industry an advantage and creating new pathways to emit calculated wavelengths of light with computer chips, producing light for different causes. We are living in a time where lighting is not just used as a room lighting tool anymore, but instead, can be fine-tuned and prescribed at certain dosages. Architectural lighting manufacturers are still learning, researching, and growing. Wavelengths in the FAR-UV-C range are being studied to combine both strategies – prescribed healing and virus deactivation under safe white light. Only time will tell where this brings our industry and our world.

The following is our distilled list of resources intended to help guide your thinking on the most appropriate disinfecting light for your facility. We are happy to discuss further with you.

Architectural Lighting Products (vs. medical equipment)

Kenall Lighting – https://kenall.com/Indigo-Clean

Vital Vio – https://vitalvio.com/pandemic/

PMC Lighting (using Vital Vio) – https://www.pmclighting.com/search-pur-led-2/

Ellumi (using Vital Vio) – https://www.ellumilighting.com/

GE Light – https://products.gecurrent.com/indoor-lighting/disinfection

Cooper Industries- http://www.cooperindustries.com/content/public/en/lighting/resources/LightingStories/guv.html

UV-C Range

Acuity – https://www.acuitybrands.com/resources/trending-topics/uv-light-disinfection-technology

Puro Lighting – https://purolighting.com/

Additional Resources

IES – https://www.ies.org/standards/committee-reports/

Mazzetti – https://www.mazzetti.com/resources/covid-19-information-insights/

Mazzetti Lighting Studio – https://www.mazzetti.com/solutions/lighting-design-studio/


Aaron Schiess, PE

Associate, Senior Mechanical Engineer

Andy Neathery

Technology BIM Specialist

Angela Howell, BSN, RN

Medical Equipment Planner

Angelica Chow, PE, LEED AP BD+C

Electrical Engineer

Anjali Wale, PE, LEED AP

Senior Electrical Engineer

Arturo S Salud

Associate, Senior Electrical Designer

Austin Barolin, PE, CEM, LEED AP O&M

Senior Associate, Senior Energy Analyst

Bethany Beers, CCP, LEED AP BD+C

Senior Associate, Energy & Commissioning Consultant

Brennan Schumacher, LEED AP

Associate Principal, Lighting Design Lead

Brian Hageman, LEED AP

Associate Principal, Plumbing Discipline Lead

Brian Hans, PE, LEED AP

Associate Principal, Senior Mechanical Engineer

Brian J. Lottis, LEED AP BD+C

Associate, Senior Mechanical Designer

Brianne Copes, PE, LEED AP

Senior Associate, Mechanical Engineer

Chiao-Wei Yu

Associate, Director of VDC

Chris Hanzel, PE, LEED AP

Senior Associate, Senior Mechanical Engineer

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