Lighting for Healthcare - Learning Objectives
Our medical facilities should be designed to provide healthful environments inside and out where staff and patients can have an optimal work and care environment.
A healthy building has lighting designed to do no harm to the occupants nor the environment.
"...Kimmel went on to say that his wife, Molly, gave birth to their second child on April 21, a boy named Billy. Everything seemed normal at first, until a few hours later, when a nurse discovered that he had a heart murmur and noticed his skin was a bit purple...." https://www.washingtonpost.com/news/arts-and-entertainment/wp/2017/05/02/an-emotional-jimmy-kimmel-discusses-newborn-sons-heart-disease-makes-passionate-health-care-plea/
When selecting lighting sources for healthcare, keep in mind, "You cannot see a color unless the wavelength is present in the light source." We are used to seeing colors in daylight and this is the ultimate light source; however, many clinical settings are in basements or other windowless environments, and also, services are offered after dark.
Lighting design for healthcare needs to include specific wavelengths for detecting blood disorders, blood infections, and cyanosis, by observation of lips, gums, skin, nail beds and palm creases. The 660 nm wavelength is often associated with the color of human blood. Look for products complying with Cyanosis Observation Index (COI)
"The algorithm measures the cyanosis observation index (COI) of a luminaire and is an indication of sufficient energy in the 660-nm red area of the SPD and the presence of cyan." 
Dain, Stephen. (2015). The Visual Recognition of Cyanosis and the Influence of Lighting and Color 
The bewildering array of light sources and lighting fixture choices is confusing. Understanding how colors appear under different light sources, CRI, CCT, and other metrics for color rendering, and controlling glare are all important lighting challenges.
The Lighting Facts Card describes some qualities of light source.  See Color in Light Sources.
Cyanosis Observation Index (COI) Compliant Luminaires
What is cyanosis?www.ecopoint.co.nz/resources/articles/cyanosis-lighting/
Australian Standard -
New Zealand Standard -
Companies manufacturing 660nm luminaires for healthcare:
Bridgelux - https://bridgelux.com/sites/default/files/resource_media/Bridgelux%20White%20Paper%20-%20Average%20Spectral%20Difference%20051420.pdf
Pathway - https://www.pathwaylighting.com/
Klik - https://kliksystems.com.au/kliktek/cyanosis
Focal Point - https://www.focalpointlights.com/blog/assessing-suitability-light-source-healthcare-environments-using-cyanosis-observation-index-coi
Planet Lighting - Australian Cyanosis compliant -
SINCE OUR INDUSTRY IS CONSTANTLY CHANGING, BE SURE YOU ARE SPECIFYING CURRENTLY AVAILABLE LIGHT SOURCES THAT INCLUDE 660 NM (NANOMETERS)
Doctors, Nurses, & Volunteers
In addition to lighting for patients, the staff of healthcare facilities has the need for good quality glare free lighting. "Many volunteers are retired, but want to continue to be active in the community. Doctors and nurses are aging and will need appropriate light to carry out their work. In 2010, 40% of doctors were over the age of 55, and 33% of nurses were over the age of 50."  For more information on Glare, please visit our page Lighting for Seniors & Low Vision.
IES RP 29-16 Care Facilities by the Facility Guidelines Institute (FGI).1 Part I of this document addresses the many design considerations important for healthcare facilities, while Part II identifies specific room types that have unique lighting needs. https://www.ies.org/
Visible Light Disinfection
LRC studies the use of UV-A LED lighting to disinfect hospital room (UPDATED) Feb 22, 2020
Levels of UV-A radiation that are safe for humans can kill pathogens over time in a hospital room environment, but the radiation can damage other furnishings and equipment. 
LED Magazine June 2018 issue stated:
"The technology uses violet light, just above the ultraviolet (UV) bands, mixed with white light in luminaires with the violet energy destroying pathogens through continuous exposure while the white light affords functional illumination in a space. The technology targets specific molecules in bacteria cells and results in an overload of oxygen that explodes the cells over time. The company says the technology can kill a variety of bacteria present on surfaces and harmful organisms including MRSA (Methicillin-resistant Staphylococcus aureus),Salmonella, E. coli (Escherichia coli), and C. diff (Clostridium difficile)." 
To learn more about Visible Light Disinfection visit these manufacturer's websites.
Acuity - https://vitalvio.com/the-science/
Kenall - https://indigo-clean.com/what-is-it
Hubbell - https://www.hubbell.com/hubbelllightingci/en/spectraclean - Hubbell
GE - https://products.gecurrent.com/sites/products.currentbyge.com/files/documents/document_file/IND557-LBU-Recessed-Luminaire-Disinfection-Series-Spec-Sheet.pdf
Introduction to Visible Light Disinfection