Full Spectrum LED Light Therapy: Mechanism, Applications and Professional Usage Guide
Abstract: Full Spectrum LED Light Therapy is known to be a non-invasive technology based on photobiomodulation, which uses a type of energy similar to that of sunlight. This technology contributes to the treatment of a number of human diseases, and this is made possible by constant manipulation of photon energy. Full Spectrum LED Light Therapy is advantageous over traditional types of therapy because of its safety, good adaptability and effectiveness. The purpose of the current paper is to introduce Full Spectrum LED Light Therapy as a new trend in the field of phototherapy technologies.
Keywords: Full Spectrum LED; Light Therapy; Photobiomodulation; Skin Rejuvenation; Sleep Regulation; Physical Rehabilitation

1. Overview of Full Spectrum LED Light Therapy
   Full Spectrum LED Light Therapy is defined as a modern form of phototherapy technology, which uses high-quality equipment and provides people with continuous light. Historically, this method is more advanced compared to traditional phototherapy methods, so it offers users many advantages over older methods. The main difference between new methods of phototherapy and old ones is that the new technology is based on full spectrum light, which covers all important therapeutic wavelengths.This has been achieved through the usage of a therapy using LEDs, also known as full-spectrum LED light therapy, which is recognized as a primordial aspect of photobiomodulation, since it operates by utilizing low-photon energy to trigger various biological reactions inside the human body, which is achieved without producing heat and side reactions. Nowadays, having been updated continuously in the past few years, with the assistance of use of cutting-edge technologies in LED chip production and their application in the study of physiology of phototherapy, the method has started replacing the traditional approach, which involves the use of one-color light therapy equipment.
2. Mechanism behind Full-Spectrum LED Light Therapy
   Full-spectrum LED light therapy works by virtue of the principle of photobiomodulation, which follows the above-mentioned approach and is capable of performing three main functions, which have been thoroughly researched scientifically.
   2.1 Energy Activation and Enhancement of Metabolism in Cells
   Both red light, which has a wavelength of 630-660 nm, and near-infrared light of 830-850nm wavelength penetrate the surface of the skin, reaching dermis, muscle, and even joint cells, and have a direct impact on cell mitochondria ensuring high efficiency of ATP synthesis. The presence of sufficient amount of ATP energy stimulates all metabolic processes that occur in skin and body cells, enables quicker elimination of waste products, and even facilitates the repair of damaged cells and rejuvenation of the old ones. Various clinical trials have shown that continuous LED phototherapy increases the viability of cells by at least 25 percent while improving tissue
   2.2 Collagen Synthesis and Skin Tissue Remodeling
   Specific wavelength photons in the full spectrum can increase the expression of collagen synthesis genes COL1A1 and COL3A1 as well as promote the secretion of TGF-beta. This biological reaction enables fibroblasts to grow and secrete proteins in the extracellular matrix, thus increasing collagen density in the skin. Clinical statistics show that during a 12-week full-spectrum LED light therapy session, the degree of skin collagen density will increase by 31%, which allows for a better look of fine lines, dryness, and sagging skin.
   2.3 Neuroendocrine and Circadian Rhythm Regulation
   The visible light cluster of the full spectrum will affect the activity of photoreceptors and ipRGC signals in the retina and thus transmit information to the SCN, the center of the biological clock of the human body. Moreover, this phenomenon enables the regulation of the rhythm of secretion of melatonin and cortisol and helps improve sleep, cope with SAD and increase human ability to concentrate. It should also be noted that continuous exposure to artificial non-natural light will result in circadian desynchronization of the human body, which is why full-spectrum LED light therapy is said to be able to reverse the consequence of “mal-illumination.”
3. Unique Advantages of Full Spectrum LED Light Therapy
   Unlike traditional single red-wave light, blue light, and infrared light therapy, full-spectrum LED light therapy has a substantial technical advantage and the achievement of better results, which is one of the main reasons for the quick popularity of the invention in the professional area.

3.1 Complete Spectral Coverage and Multiple-Effect Synergy

With traditional LED light therapy using only one wavelength to treat one type of ailment, like blue light for acne removal and red light for anti-aging, full-spectrum LED technology allows the use of many wavelengths to improve skin rejuvenation, anti-inflammation and sterilization, metabolism adjustment, and nerve regulation, overcoming the issue of limited effectiveness presented by traditional technology.

3.2 Safe and Gentle, Not Harmful

The full-spectrum LED light is free from UV rays and high-temperature radiation, employing low-energy light output, thus being incapable of causing thermal injuries, skin redness, and inflammation. More importantly, there are no side effects and dependence after long-time application of the technology and it is appropriate for any kind of skin, including sensitive and worn skin.

3.3 High Versatility and Excellent Compatibility

This technology can be used independently for routine health care and can be combined with medical procedures as an additional form of treatment. It has good compatibility with different methods of non-invasive aesthetic procedures, rehabilitation exercises, and sleep therapy, helping to achieve better results in therapy.

4. Professional Areas of Application for Full-Spectrum LED Light Therapy

Owing to its numerous advantages and high safety rate, full-spectrum LED light therapy is widely applied in the field of medicine, cosmetics, and at-home care. Its application is both in dealing with wrinkles of the skin, eliminating fine lines and yellow pigmentation as well as reducing the skin sagging problem. At the same time, this technology can repair the extremely sensitive skin barrier, cope with inflammatory acne and remove redness of the skin. Due to regular phototherapy, it is possible to improve oil secretion of the skin, speed up the regression of inflammatory processes in the skin and lead to a long-lasting improvement of the overall state of the skin. Medical beauty centers usually suggest getting phototherapy procedures every time for 30 minutes 3-4 times a week.
4.2 Clinical Physical Rehabilitation
Full-spectrum infrared light can penetrate to the areas of muscles and joints, relieve muscle pain, joint inflammation and soft tissue swelling. Moreover, this application of light is very effective for the quick repair of injuries in sports and chronic problems with soft tissues. The full-spectrum light therapy is widely used in the treatment of cervical and lumbar spondylosis, arthritis, muscle strain and other diseases in rehabilitation departments. Its use allows fast rehabilitation.
4.3 Adjustment of Sub-health and Sleeping Patterns
Modern people face many sub-health problems because of their irregular way of living. They suffer from circadian rhythm disorder, poor-quality sleep, lack of energy as well as emotional depression. As full-spectrum lighting allows controlling neuroendocrine levels, it is able to manage the biological clock and positively influence the secretion of melatonin at night. Thus, the patients manage to cope with insomnia and daytime fatigue.
4.4 Home Health Care
Thanks to the development of technologies, people are now able to get LED equipment for home use.Short-term full spectrum light therapy can compensate for the lack of natural light exposure, boost metabolism, and improve immunity and achieve anti-aging and health maintenance effects.
5. Standard Application Protocol and Issues
To ensure that full spectrum LEDlight therapy achieves its therapeutic purpose and is safe for use, some professional guidelines must be followed.
5.1 Use Guidelines
For daily skin care, the recommended irradiation time is 20-30 minutes about three to four times a week; for professional rehabilitation or skin repair, the time can be increased up to 30-40 minutes with a treatment course lasting 8-12 weeks in order to achieve some therapeutic effect. Irradiation distance must be controlled between 15-30cm to avoid focus of excessive energy.
5.2 Adaptability and Contraindications
Full spectrum LED light therapy can be used by almost everybody including healthy people and sub-health groups while abstaining from using it in case of severe reaction of the skin to the light, the fact of taking medication causing sensitivity of the skin, the presence of serious malignant diseases, and pregnant women in certain periods. Care should be taken to avoid direct continuous exposure to the eyes.
5.3 Maintenance Issues
Equipment used for full spectrum LED light therapy must be cleaned on a regular basis, preventing any dust particles from affecting light energy output; equipment used must not be kept on permanently so as to make it work for long and prevent possible light source burn out; and civilian instruments must be used as dictated by the instruction, avoiding any unauthorized changes of its parameters.
6. Full Spectrum LED Light Therapy Industry Perspectives
With the rapid advancement of LED semiconductor technology in recent times, and the growing need for green health methods more and more people have started using full spectrum LED light therapy. Unlike conventional single function lights, full spectrum LED technology has a higher technical threshold and thus has started besetting the market.
In medicine, full spectrum LED light technology enjoys increasing popularity in the treatment of chronic diseases, rehabilitation after surgery, and neuromodulation; in the civilian market, compact portable equipment is being introduced, making the effects of medical treatment available in home conditions. Eventually, the merger of the intelligent technology and personalized spectra adjustment technology in the future will enable full scale implementation of full spectrum LED therapy.