HP4 R installed at Seattle Children's Hospital with the Indigo-Clean Technology A brand of Legrand logo

100% Safe Lighting Disinfection

Mitigating COVID is as easy as turning on the lights. Indigo-Clean lighting technology is occupant safe, continuous, and effective at killing Influenza-A, Staph Aureus, SARS-CoV-2* - the virus that causes COVID-19, plus a list of pathogens that negatively impact health and wellness. This easy to design, install, operate, and maintain system complements and strengthens current cleaning efforts.

  • Indigo-Clean Technology
  • Declare and Third Party Verified
  • 5 Year Warranty

Visible Light That Kills Harmful Viruses and Bacteria

Using a patented blend of 405 nanometer indigo and white LED, Indigo-Clean bathes spaces in germ-fighting protection. Unlike UV, Indigo-Clean light technology is both direct and indirect. Reflecting off walls and other surfaces, it reaches the many shadowed areas UV light can’t. Once exposed, pathogens are oxidized from within, no matter where they exist: in the air and on surfaces.

Indigo-Clean Kills Viruses

SARS-CoV-2 (cause of COVID-19)
Influenza A

Indigo-Clean Kills ESKAPE Pathogens

Enterococcus faecalis
Staphylococcal Aureus (incl. MRSA)
Klebsiella pneumoniae
Acinetobacter baumannii
Pseudomonas aeruginosa
Enterbacter species

Indigo-Clean Kills Microorganisms

C. diff
Aspergillus niger
Salmonella enteritidis


Safe For Occupants and Materials

Indigo-Clean Technology has been tested and evaluated against international standards and is certified as “risk exempt” meaning that people can be in the space without exposure limits for any period of time. The Indigo-Clean Technology 405nm is visible light and safe for people and materials unlike all types of ultraviolet light.

Indigo-Clean Germicidal Wavelength

Ideal For Most Applications

Indigo-Clean Technology is ideal for any application where people congregate, including Commercial, Healthcare, Educational, Retail, Transportation, and is trusted to keep spaces clean and people safe. Protect 100% of what matters most with Indigo-Clean technology.

Indigo-Clean Applications Ideal for Education, Healthcare, Office, Retail, and Transportation


Finelite Portfolio Using Indigo-Clean Technology

Indigo-Clean Technology is available in 3200K, 3700K, and 4300K


Around the Clock Disinfection

Indigo-Clean Technology provides disinfection around the clock making it a valuable addition to any cleaning protocol. Whether using Single-Mode or Dual-Mode Technology, Indigo-Clean is always occupant safe and effective.

Single-Mode Indigo-Clean Technology is a continuous environmental disinfection system that employs blended white + 405nm visible light on a single circuit board design to disinfect the space. When the light is on, disinfection is active. Recommended operation schedule of 24/7 with an average of 50-60 footcandles on work plane and high touch surfaces.

Dual-Mode Indigo-Clean Technology utilizes a two-circuit board design. When the space is occupied, it utilizes a combination of blended white LEDs and 405nm LEDs. When the space is unoccupied, it utilizes just the 405nm LEDs with increased output to increase disinfection efficacy. Dual-Mode switches between occupied and unoccupied via automated controls, such as occupancy sensors and timeclocks. Recommended operation schedule of 12 hours blended mode and 12 hours Indigo mode with an average of 50-60 footcandles on work plane and high touch surfaces.



White + Indigo 405nm Blended Only

White + Indigo 405nm Blended or Indigo 405nm Only

Automated Controls

SARS-CoV-2 & Influenza-A Claim

Recommended Hours of Operation

Optimum Performance

Dual-Mode Indigo-Clean




94% Kill Rate

24/7 Operation (12 hrs blended / 12 hrs Indigo only)

Average 50-60 footcandles

Single-Mode Indigo-Clean




Effectively Kills

24/7 Operation

Average 50-60 footcandles


Indigo-Clean Dual Mode


Certified Safe


Testing Methods


IEC 62471/62778 1,2

Independent 3rd Party Laboratory

Pass (Exempt)








  1. International Electrotechnical Commission – Photobiological safety of lamps and lamp systems, 2006

  2. International Electrotechnical Commission – Application of IEC 62471 for the assessment of blue light hazard to light sources and luminaires, 2014

  3. American Conference of Governmental Industrial Hygienists – Threshold Limit Values (TLVs) & Biological Exposure Indicies Signature Publications, Cincinnati, 2007

  4. International Commission on Non-Ionizing Radiation Protection – Guidelines on limits of exposure to optical radiation from 0.38 to 3.9 mm. Health Physics 73; 539-555; 1997

  5. International Commission on Non-Ionizing Radiation Protection – Guidelines on limits of exposure to ultraviolet radiation of wavelengths between 180 nm and 400 nm (incoherent radiation) Health Physics 87, 171-186; 2004


* "The virucidal effects of 405 nm visible light on SARS-CoV-2 and influenza A virus" Nature Peer Reviewed Article

If you have any questions about Indigo-Clean Technology, please contact us.

Indigo-Clean is a registered trademark of Kenall Manufacturing Co., a Legrand company.