One of the most common misconceptions in the wellness industry is that near infrared therapy and red light therapy are the same thing.
While they are closely related and often used together, they are actually different wavelengths of light that interact with the body in different ways.
Understanding the difference between near infrared therapy and red light therapy can help you make better decisions when choosing wellness devices, photobiomodulation systems, and full spectrum sauna technology.
The Short Answer
Red Light Therapy
Uses visible red light.
Typical wavelengths:
- 620nm–700nm
Often associated with:
- Skin wellness
- Surface-level applications
- Photobiomodulation
Near Infrared Therapy
Uses invisible near infrared light.
Typical wavelengths:
- 700nm–1100nm
Often associated with:
- Cellular wellness
- Recovery support
- Deeper tissue penetration
- Photobiomodulation
Both technologies are forms of photobiomodulation.
The primary difference is wavelength and tissue penetration.
What Is Red Light Therapy?
Red light therapy uses visible red wavelengths that can be seen by the human eye.
Common wavelengths include:
- 630nm
- 660nm
Because red light remains closer to the surface of the skin, it is frequently discussed in relation to:
- Skin wellness
- Skin appearance
- Healthy aging routines
- Surface tissue applications
Red light therapy has become increasingly popular in wellness centers, spas, and home wellness devices.
Related Reading:
https://celebrationsaunas.com/what-is-red-light-therapy/
What Is Near Infrared Therapy?
Near infrared therapy uses wavelengths that are invisible to the human eye.
Common wavelengths include:
- 810nm
- 850nm
- 940nm
Near infrared wavelengths penetrate deeper into tissue than visible red light.
Researchers continue studying near infrared therapy in relation to:
- Cellular wellness
- Recovery support
- Circulation
- Muscle relaxation
- Overall wellness
Many advanced sauna systems incorporate near infrared emitters for this reason.
Related Reading:
https://celebrationsaunas.com/what-is-near-infrared-sauna-therapy/
The Biggest Difference: Penetration Depth
The simplest way to understand the difference is penetration.
Red Light Therapy
Primarily interacts with:
- Skin
- Surface tissues
Near Infrared Therapy
Can penetrate deeper into:
- Soft tissues
- Muscles
- Joints
- Underlying structures
This difference is one reason many wellness devices combine both technologies.
What Is Photobiomodulation?
Photobiomodulation is the scientific term used to describe how specific wavelengths of light interact with living tissues.
Both red light therapy and near infrared therapy are forms of photobiomodulation.
Researchers continue studying photobiomodulation for potential applications related to:
- Cellular function
- Recovery
- Tissue support
- Skin wellness
- Overall well-being
Related Reading:
https://celebrationsaunas.com/what-is-photobiomodulation/
Why Are Red Light and Near Infrared Often Used Together?
Many wellness systems combine both wavelengths because they complement each other.
Red Light
May support:
- Surface tissue applications
- Skin-focused wellness routines
Near Infrared
May support:
- Deeper tissue applications
- Recovery-focused wellness routines
Together, they provide a broader range of light exposure than either technology alone.
Near Infrared vs Red Light Therapy in Full Spectrum Saunas
Many premium full spectrum and hybrid saunas include both red light and near infrared technologies.
This allows users to combine:
- Infrared heat therapy
- Near infrared therapy
- Red light therapy
- Photobiomodulation
within a single wellness session.
For many wellness enthusiasts, this combination represents one of the most advanced sauna experiences available today.
Related Reading:
https://celebrationsaunas.com/what-is-full-spectrum-sauna-technology/
Which Is Better?
Neither is inherently better.
They simply serve different purposes.
Choose Red Light Therapy If You’re Interested In:
- Skin wellness
- Surface-level light therapy
- Visible red light applications
Choose Near Infrared Therapy If You’re Interested In:
- Recovery support
- Cellular wellness
- Deeper tissue penetration
- Advanced photobiomodulation
Choose Both If You Want Maximum Flexibility
Many wellness professionals and advanced users prefer systems that combine both technologies.
The Bottom Line
Red light therapy and near infrared therapy are closely related but distinct technologies.
Red light primarily interacts with tissues near the skin’s surface, while near infrared wavelengths penetrate deeper into the body.
Because they complement one another, many modern wellness systems—including full spectrum and hybrid saunas—incorporate both technologies to create a more complete photobiomodulation experience.
Related Articles
What Is Near Infrared Sauna Therapy? Benefits, Photobiomodulation, and Cellular Wellness
https://celebrationsaunas.com/what-is-near-infrared-sauna-therapy/
What Is Red Light Therapy? Benefits, Science, and How It Works
https://celebrationsaunas.com/what-is-red-light-therapy/
What Is Photobiomodulation? Understanding Light Therapy and Cellular Wellness
https://celebrationsaunas.com/what-is-photobiomodulation/
What Is Full Spectrum Sauna Technology?
https://celebrationsaunas.com/what-is-full-spectrum-sauna-technology/
Near Infrared vs Far Infrared Sauna: What’s the Difference?
https://celebrationsaunas.com/near-infrared-vs-far-infrared-sauna/
References
Hamblin MR. Photobiomodulation or Low-Level Light Therapy.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5523874/
de Freitas LF, Hamblin MR. Proposed Mechanisms of Photobiomodulation.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5215870/
Harvard Health Publishing. Red Light Therapy: What Is It and How Does It Work?
https://www.health.harvard.edu/staying-healthy/red-light-therapy-what-it-is-and-how-it-works
National Center for Biotechnology Information. Photobiomodulation Therapy in the Treatment of Chronic Conditions.