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Advantages or benefits of light therapy | Green Red Blue IR LED

This page covers advantages or benefits of light therapy using Green LED, Red LED, Blue LED and IR (Infrared) LED light. It mentions advantages of green led light, red led light, blue led light and IR led light.

What is Light therapy ?

The different light of colors are used for therapeutic benefits since decades. According to one study, light therapy requires 20 minutes for each treatment. Patients require about 8-10 such treatments based on desired results.

LED based light therapy can be applied to any parts of the body such as face, neck and chest. LED based light therapy has several advantages or benefits.
• It does not cause long term damage to the skin as it is non-invasive method.
• It does not burn our skin.
• Moreover it does not cause any pain to humans.
• There are rare side effects of LED light therapy treatment. Some of the symptoms are redness, inflammation, pain, rash, tenderness etc. It is better to call the doctor if one observes any of these symptoms.

What are Green, Red, Blue and IR LED lights ?

Different light based LEDs and photodiodes are used in wearable devices to monitor various health parameters such as heart rate, beat rate, oxygen saturation etc. Different colors have their unique wavelengths. Absorption of light in blood varies based on amount of hemoglobin and wavelength of light. It also depends on spectral responsivity of photodiodes.

Light wavelength vs absorption in blood
Image Courtesy : OSRAM Opto Semiconductors

The light with shorter wavelengths from blue to yellow are absorbed strongly. The light with longer wavelengths from red to infrared are used for pulse oximeter applications. Red light wavelength range from 620 to 750 nm. Blue light wavelength range from 450 to 495 nm. Green light wavelength range from 495 to 570 nm. IR (Infrared) light wavelength range from 700 nm to 1 mm. Specific wavelength of these colors are used for light therapy treatment. The Green, red, infrared and blue light use 530 nm, 665 nm, 940 nm and 470 nm respectively. Blue light has shorter waves than red light. Blue light has higher frequency than red light and consecutively carry more energy. OSRAM Opto semiconductors manufactures LED emitters, photodiode detectors and integrated solutions with both. Refer article on Health monitoring system >> which describes use of LEDs and photodiodes in heart rate and SpO2 measurement.

Benefits or advantages of Green LED Light

Following are the benefits or advantages of Green LED:
➨It increases production of enkephalins.
➨It reduces inflammation.
➨Due to above two characteristics, green LED light can be used to treat or decrease migraines and other chronic pain conditions.

Benefits or advantages of Red LED Light

Following are the benefits or advantages of Red LED:
➨Red light therapy with low wavelength is used for treatment of skin related issues viz. wrinkles, wounds, scars etc.
➨Red LED light reduces inflammation and improves circulation. This provides healthier glow to human being.
➨Light emitted from red leds help to promote growth of plants by photosynthesis of plant cells.
➨Red light helps to increase energy inside cells of human beings.
➨It can be used for treatment of muscle atrophy and bone density related issues observed by space travellers.
➨It can also be used to treat side effects caused by chemotherapy.

Benefits or advantages of Blue LED Light

Following are the benefits or advantages of Blue LED:
➨Sebaceous glands lubricate our skin and hair. Our skin becomes oily and causes acne when these glands become overactive. Blue light makes these glands less active and hence helps in treatment of acne.
➨Blue light kills bacteria beneath our skin which causes acne and helps in treatment of severe pimples.
➨As per one study, blue LED helps in healing of third degree skin burned patients.
➨It is used with red light to treat acne, to promote anti-inflammatory effects and to decrease scarring.

Benefits or advantages of IR LED Light

Following are the benefits or advantages of IR LED:
➨It can penetrate deep inside the skin. Hence it is used to treat pain and inflammation of body parts.
➨Infrared (IR) light enhances cell regeneration unlike UV light which damages skin. Hence it is used at certain wavelength to repair cells.
➨Infrared light therapy is natural, safe, non-invasive and painless method.

Infrared rays raise temperature of eye which can lead to lens, cornea and retina damage including corneal ulcers, cataracts and retinal burns.

Note : Like all the other treatment methods, light therapy can also cause certain side effects which vary patient to patient. Hence in case of such side effects it is recommended to consult the doctors post treatment. It is also recommended not to try treatment using such lights yourself at home.

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