What is Light Therapy?

"What is Light Therapy?" with Dr. Adrian Larsen

Light Therapy


Light is energy, and energy sustains life. Energy cannot be destroyed, but it can be transformed into other forms.Throughout the ages, sunlight (the earliest form of phototherapy) has been known to have both healing and wellness properties.

Although light (photon) Therapy has been documented in medical literature as early as 1500BC, it was the Danish physician Nils Finsen, who is believed to be the father of phototherapy. He received a Nobel Prize for his work in 1903. Since then, numerous authors have advocated treatment by phototherapy for many different diseases including acne, vitiligo, jaundice in babies, wound healing and rheumatoid arthritis—to name only a few. Light, at the correct wavelengths, can kill harmful bacteria, promote wound healing, increase cellular ATP production, profoundly affect mood, reduce pain, and promote circulation, along with other benefits.

All biological systems have a unique absorption spectrum that determines what wavelengths of radiation will be absorbed to produce a given therapeutic effect. The visible red and invisible infrared portions of the spectrum have been shown to have highly absorbent and unique therapeutic effects in living tissues.

Photizo Light Therapy harnesses the healing power of red and infrared light at specific wavelengths and frequencies shown to be effective in accelerating natural healing, reducing swelling and inflammation, stimulating the immune system and relieving pain. Cells that are injured can actually be rejuvenated by light.

Red and Infrared Light

Red Light and Infrared Light

Visible Red Light: Red light at a wavelength of 660 nanometers penetrates tissue to a depth of about 8-10 mm (about 3/8″). It is very beneficial in treating problems close to the surface such as wounds, cuts, scars, trigger points and acupuncture points, and is particularly effective in treating infections.

Infrared Light: Infrared light is not visible to the eye. It penetrates to a depth of about 30-40 mm (1.2″ to 1.4″), which makes it more effective for bones, joints, deep muscles, bursa, etc. Infrared light is one of the safest therapies on the market today. When infrared light is administered, it reduces sensitivity of neural pathways and causes the body to release endorphins that provide a nontoxic, natural form of pain relief. Unlike ultrasound and electrical stimulation, infrared technology is so gentle that patients can use it frequently without causing more damage to injuries or other chronic pathologies.

Although both red and infrared wavelengths penetrate to different depths and affect tissues differently, their therapeutic effects are similar.

Laser vs. LED

Laser vs. LED

Both lasers and LED’s (Light Emitting Diodes) are capable of producing healing light at the correct wavelengths. But these light sources differ in important ways as well.

Lasers deliver concentrated, focused-beam, coherent light over a very small area. At high power levels, such light is capable of burning, cutting, and causing injury. At lower power levels, laser light can have stimulating and healing effects. Because it is concentrated, laser light penetrates deeply, but is limited to a confined area.

Lasers may require certain safety precautions and eye protection, as laser light is very dangerous to the eyes.

LED’s deliver light over a more broad area, but at lower power. Their greater area coverage allows the maximum number of cells to receive beneficial light stimulation, with a faster treatment time than lasers. LED’s provide light at a more gentle power level than lasers, and therefore do not require precautions for eye safety.

Miridia Technology Inc. is the authorized U.S. Distributor of the Photizo Pain Relief and Photizo Vetcare devices.


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