Understanding Light Therapy
A simple introduction to Photobiomodulation, the Science of Light, and how different wavelengths interact with the body.
What Do The Colors Do?
Why Do Different Wavelengths Matter?
Different wavelengths of light interact with the body at different depths. Understanding wavelength is an important part of understanding photobiomodulation—and why different light therapy systems use different combinations of light.
Light Doesn't All Act the Same Way
The color or wavelength of light influences how deeply it can penetrate tissue and which structures it may interact with. This is why light therapy isn't simply about using “red light.” Different wavelengths can serve different purposes, depending on the application and the device.
Blue: Primarily interacts with more superficial tissues and is commonly used in applications involving the skin and surface-level structures. It is often used to support skin health and is well-known for being aimed at soothing wounds, ache, and blemishes.
Green: For general wellness and relaxation. It is often associated with promoting calmness and helping to support comfortable and balanced states of mind and body.
Red: Known for reaching slightly deeper into the skin's surface and is often utilized to support the temporary relief of minor aches and muscular pain. It also assists the body in promoting localized circulation, which is great for overall support and recovery.
Near Infrared: Near-infrared (NIR) light is invisible to the human eye and penetrates the deepest, making it ideal for supporting comfort and relaxation in deeper muscle and joint tissues.
Why This Matters
Choosing a light therapy system isn't simply about choosing “red light.” Wavelength, power density, dose, pulsing, treatment area, and application all matter.Understanding these factors can help you make more informed decisions about light therapy.
Continue Learning with CHI
Want to see light therapy in action or explore the concepts in more depth? Visit the Complete Health Initiative YouTube channel for educational videos covering photobiomodulation, light therapy, wavelengths, devices, and practical applications.
Explore CHI on YouTube
What People Are Saying
Miranda K., IA
in 24 hours! I can literally see & feel the healing.
Wanda H., CA
Light as a Signal
Photobiomodulation uses specific wavelengths of light to deliver a signal to the body.
This is part of what makes light therapy so interesting: light is information.
As you continue exploring photobiomodulation, you'll learn how light interacts with the body, why wavelength and dose matter, and how these principles are being applied across a growing range of health and wellness applications.
Where is Light Therapy Being Applied?
Photobiomodulation is being explored and used across a wide range of applications. The examples below offer a starting point for understanding some of the ways light therapy is being incorporated into health and wellness settings.
Explore these examples to see how different applications may use specific wavelengths, devices, and approaches.
Emotional Health
Peripheral Neuropathy
Open Wide!
Stay Connected with CHI
Keep learning with Complete Health Initiative. Get educational content, light therapy insights, new resources, and updates on courses, certification, and products delivered to your inbox.
Helpful Links
