What are the functions of 660nm, 850nm, 590nm red light waves?

When it comes to red light therapy, many people are still relatively unfamiliar with it, and they are also very curious, whether "red light" is really so magical, what kind of light works, and how does it work?

Red light waves have gained significant attention in recent years due to their diverse applications in various fields. This essay explores the functions and applications of three specific red light wavelengths: 660nm, 850nm, and 590nm. We delve into the scientific principles behind these wavelengths, their effects on biological systems, and their applications in different domains, including medical, horticultural, and technological settings. By understanding the unique properties of red light waves, we can harness their potential for a wide range of beneficial applications.

 660nm red light

First, I want to tell you a story.

In the 1980s, in order to promote the sustainable growth of plants in space, the National Space Administration (NASA) developed a lighting device, and later funded the completion of a plant growth device, and planted potatoes on the space shuttle in 1995. In the absence of gravity for a long time, astronauts found that muscles and bones atrophied and any wounds healed slowly. One day, one of the scientists accidentally scratched his hand while working. Because of this, he found that the wound on the hand working under the light healed faster. At this point, NASA began to enter the field of medical phototherapy.

At this point in the story, you must have discovered one of the functions of light.

Next, I want you to talk about light.

The light that our naked eyes can see is called visible light. The wavelength band of visible light is: 400nm-700nm. The light within this range is called invisible light. Note that being invisible does not mean that it does not exist.

The red light physiotherapy mainly uses 590-660nm (red light) and 850nm (near infrared light) as the main wave band non-invasive physiotherapy.

So what is the mechanism of action of physical therapy? In other words, how does red light therapy work on the human body?

Please see this picture:

 660nm red light

In summary, light acts on the chromophore in the cell, the chromophore absorbs the light energy and converts it into heat and chemical energy, and then activates the mitochondrial respiratory chain in the cell, which leads to a series of cellular Reaction, produce more ATP (what is ATP we will explain in another chapter).

Our skin is composed of white cortex and dermis. According to research, 400nm light can penetrate 1mm of skin tissue, 500nm can penetrate up to 2mm, and red light (590-660nm) can penetrate up to 2mm. 6mm, reaching to the dermis. Helps our cells release more ATP, making us feel younger and more energetic.

 660nm red light

Next, I will mainly introduce some specific features and functions of 660nm:

The 660nm Wavelength (Red Light)

There is an abundance of literature outlining the benefits offered by the 660nm wavelength. The 660nm reaches into the entire range of the skin tissue to promote healing and regeneration.

Some of its diverse benefits include:

Reduced training fatigue

The 660nm wavelength teamed with the 830nm near-infrared wavelength has been proven to delay the development of fatigue in the muscles, and enhance skeletal muscle performance. 

660nm red light therapy

Reduced inflammation 

In a study investigating the effects of red light therapy on pleurisy, the 660nm wavelength was found to have an anti-inflammatory effect. 

Improved bone healing

The 660nm wavelength encourages resorption and formation in the bone cells around the location where repair is needed, without causing any change to the bone structure. 

Reduced swelling following injury 

In one study, the 660 nm wavelength was found to reduce both inflammation and swelling by reducing the number of inflammatory cells which lead to the formation of swelling.

Reduced neuropathic pain

A study investigating sciatic nerve pain in rats found that the 660 nm wavelength significantly helped to reduce pain. 

Accelerated wound healing

The 660 nm wavelength has been proven to increase the formation of new blood vessels and enhance collagen deposition to help in the healing of wounds. 

 660nm red light therapy

The 850nm Wavelength (Near-infrared Light)

The 850nm wavelength is the signature near infra-red wavelength.
In many cases, the 850nm amplifies the benefits provided by the 810nm and 830nm wavelengths.

This wavelength has a range of therapeutic applications such as:

Anti-inflammatory benefits

850nm wavelengths can help to reduce joint and muscle pain and diminish general inflammation in the body.

Enhanced muscle recovery

A study observed the use of 850nm wavelengths on athletes, and found that usage of the near-infrared light increased muscle mass after training, and decreased inflammation and oxidative stress in muscle biopsies.


Healing of wounds in the skin

Lesions heal faster when exposed to 850nm wavelength light therapy. 

Reduction of lines, wrinkles, and hyperpigmentation

850nm can support the production of collagen, assisting with plumper, more radiant-looking skin, and a more uniform texture. 


Orthodontics and tooth alignment

The use of the 850nm wavelength can foster the speedy realignment of teeth for patients undergoing orthodontics. 

The 590nm Wavelength( Yellow Light)

This light wave is mainly for skin beauty, it can make our skin younger and more elastic.

Some of its diverse benefits include:

Activate collagen and elastin fiber regeneration

Non-invasive operation, non-invasive, improves microcirculation in cells, produces more collagen, and makes skin feel firmer.

Promote blood circulation

Promote blood circulation, make the blood flow abundant, the blood can transport nutrients, generate physical strength, and deliver energy continuously like a power plant.


Beauty and skin care, against fine lines

Under the irradiation of light in the 590nm band, it can significantly improve the newly formed light lines, exuberant oily skin, and acne


Combined with red light, it has obvious curative effect on the relief and treatment of allergic skin diseases, it can lighten spots and inhibit melanin

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