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LED Light Therapy Guide: Working, Benefits, Safety and Procedure

Author: Apogeeweb Date: 19 Feb 2020  2538

red light therapy at home


LED is a new type of light source that has entered the application field in the past ten years, and it has been used in the medical field for about 6 years, showing excellent therapeutic effects in such a short period of time.


LED is a cold light source, which can well moisturize the skin while treating diseases. Besides, since high-power LEDs have strong light intensity and a good effect on the deep layer of the human skin, they are widely used in various departments in hospitals.


The LED light sources currently used in the medical field include red, blue and purple. The efficacy of LED in disinfection and sterilization, wound healing, wound treatment, inflammation elimination, edema reduction, and photodynamic tumor treatment has been fully affirmed in the medical field.

 Can LED Light Improve Your Skin?




I What is LED Light Therapy? Is it Safe?

  1.1 LED

  1.2 LED Light Therapy

  1.3 Safety&Side Effects

II LED Light Therapy Colors: Which do you Need?

  2.1 Does LED Light Therapy Actually Work?

  2.2 How to Choose the LED Light Therapy Colors?

III Specific Uses and Benefits of LED Light Therapy

IV Procedure of Performing a LED Light Therapy

  4.1 Perform a LED Light Therapy at a Professional’s Office

  4.2 How to use At-home Devices?

V LED Light Face Mask

  5.1 Does LED Light Face Mask Work?

  5.2 Are LED Face Masks Safe?

VI Frequently Asked Questions

I What is LED Light Therapy? Is it Safe?

1.1 LED

LED is the abbreviation of Lighting emitting diode, which is a light-emitting diode, which is made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc. Semiconductor.


When electrons and holes are recombined, they can radiate visible light, so they can be used to make light-emitting diodes. The gallium arsenide diode emits red light, the gallium phosphide diode emits green light, the silicon carbide diode emits yellow light, and the gallium nitride diode emits blue light.


Light-emitting diodes appeared as early as 1962. In the early days, it could only emit low-light red light, and later developed other monochromatic light versions. The light that can be emitted today has reached visible light, infrared light and ultraviolet light, and the light level has increased to a considerable level Degree.


Figure1. LED

1.2 LED Light Therapy

For many years, scientists have studied how the sun's rays, including so-called burning rays of the sun, or ultraviolet B radiation, ultraviolet A rays, or UVA, affect the skin. Only recently have we started to talk about the effects of visible light on the skin — not necessarily LED light, but visible light in general," says Dr. Buzney, assistant professor of dermatology at Harvard Medical School.


LED lights have been around since the 1960s, but have only recently been used as a skin treatment that uses varying wavelengths of light, including red, purple, green and blue.


Different wavelengths of the visible light spectrum correspond to different colors of LED light and penetrate the skin to different depths. Depending on how deeply they penetrate, LED lights are thought to have different biological effects.

1.3 Safety&Side Effects

According to Harvard Health Publishing, for the most part, these LED light therapies appear to be relatively safe, at least in the short term. The FDA has approved some products for home use. LED skin devices don't have a lot of power, so they're unlikely to burn our skin. However, it is important to shield your eyes from the light while using them.


In addition, a recent study named Phototherapy with Light Emitting Diodes indicates that a device using LEDs with frequencies of 415nm (blue), 633nm (red), and 830nm (infrared) has demonstrated significant results for the treatment of medical conditions, including mild-to-moderate acne vulgaris, wound healing, psoriasis, squamous cell carcinoma in situ (Bowen’s disease), basal cell carcinoma, actinic keratosis, and cosmetic applications.


Although photodynamic therapy with the photosensitizer 5-aminolevulinic acid might cause stinging and burning, phototherapy is free of adverse events. We determined that phototherapy using LEDs is beneficial for a range of medical and aesthetic conditions encountered in the dermatology practice. This treatment displays an excellent safety profile.


The above content is extracted from the journal directly, Let’s put it simple:

● In the short term, LED light therapies are relatively safe, but you have to care about the device's potential to damage the eyes, especially for people with underlying eye conditions or those who are taking medication that makes the eyes more sensitive to light.

● Light Therapy doesn't use UV light so there's no risk of tanning whatsoever. Therefore, you do not have to worry for regular use.

● LED light therapy doesn’t cause burns compared to other anti-aging treatments such as chemical peels, dermabrasion, and laser therapy.


In general, side effects are rare, but there may be

(1) increased inflammation

(2) Redness

(3) Rashes

(4) Tenderness

You should not use LED therapy if having taken certain medications, such as isotretinoin (Accutane), for acne or use topical treatments that cause sensitivity to sunlight.


People with skin conditions should speak to a dermatologist before using LED light therapy.


Figure2. LED Light Therapy

II LED Light Therapy Colors: Which do you Need?

2.1 Does LED Light Therapy Actually Work?

The light therapy effect of LEDs is based on the wavelengths of different spectra. Red light LEDs of 633nm to 660nm can promote collagen proliferation of the skin and even lighten fine lines and dark spots. Near-infrared LEDs with a wavelength of 780nm to 1200nm can be used Anti-inflammatory and analgesic. The blue LED and the green LED can also be used in the medical beauty market, which are respectively suitable for preventing the growth of acne and brightening, helping to absorb nutrients in skin care products, and improving the effect of allergic skin.


Laura Ferguson, founder of The Light Salon, a company focused on LED beauty, said that LED light therapy has many benefits, different effects at different wavelengths, such as anti-wrinkle or blemish, and the light will not have a band that will damage the skin Intrusive, painless light therapy, it even has a mood-relieving effect.


Ferguson said that LED can also solve the problem of skin sensitivity. After light therapy, the newly stimulated cells will have a protective layer to help prevent sunburn from being exposed to strong sunlight. LED light therapy is not like a solarium, so you don't have to worry about melanin precipitation. However, the current price of LED medical beauty products is still high. In the future, the price is expected to decline as the technology of LED medical products matures. At that time, consumers' choices and needs will be more and more diversified.

 Four Types of LED Light

Figure3. Four Types of LED Light

2.2 How to Choose the LED Light Therapy Colors?

LED light stimulates fibroblasts, which can produce collagen, thereby improving skin elasticity, scarring and enhancing skin metabolism. It can also make use of the organism's absorption of different visible light wavelengths to stimulate the mitochondria and glands to produce more energy and extend the life cycle of cells. LED light can be used in all parts of the human body, whether it is psychological or physical, scalp or toes, internal medicine or surgery, as long as the light reaches the place, it can be used for effective treatment. After laser and pulsed light, LED light therapy has become a new light therapy.


(1) Red light

The red light with a wavelength of 635nm has the characteristics of high purity, strong light source, and uniform energy density. Red light has bactericidal, repairing and pain-removing effects, which can increase cell activity and promote cell metabolism.


(2) Blue Light

Blue light with a wavelength of 405, 415nm has a strong bactericidal effect, which can quickly inhibit inflammation. During the formation of acne, it is mainly caused by Propionibacterium, and blue light can cause no damage to skin tissue, effectively destroy this bacteria.


(3) Purple Light

The violet light with a wavelength of 313, 410nm has the advantages of sterilizing, purifying the skin, activating cells, and promoting protein and collagen synthesis. It has a good effect on specific dermatitis, vitiligo, scleroderma and so on.


(4) Green Light (560nm)

Natural and soft light color, which has the effect of neutralizing and stabilizing nerves, can improve anxiety or depression; regulate skin gland function, effectively dredge lymph and improve edema, improve oily skin, acne, etc.

 Different LED Color with Different Functions

Figure4. Function of Diffrent Light 

III Specific Uses and Benefits of LED Light Therapy

(1) Photorejuvenation

Photon skin rejuvenation technology is defined as non-exfoliation skin rejuvenation treatment using low-energy density under continuous high pulse light. At present, it has become one of the main methods to improve skin photoaging. This technology can significantly improve skin wrinkles and texture.


Rough, irregular pigmentation and enlarged pores.Such phenomena have been recognized by many technical professionals and beauty applicants. The characteristic histological changes of skin photoaging are elastic fibrosis and collagen fiber maturation disorder in the dermal matrix, which leads to skin relaxation and wrinkles.


The study found that visible to near-infrared LED light penetrated the epidermis of the skin and reached the dermal layer of the skin, and promoted the regeneration and rearrangement of elastic fibers and collagen fibers through photothermal and photochemical effects, thereby reducing skin wrinkles and increasing elasticity.


(2) Prevent or treat pigmentation after inflammation

Pigmentation of skin after inflammation is a common and difficult to avoid phenomenon in skin physical and chemical cosmetology, and it is especially easy to appear in Asian people. For example, in order to reduce the degree of skin pigmentation after laser treatment in the clinic, generally avoid the season of excessive ultraviolet rays, ask patients to avoid sun, apply sunscreen, etc., but it is still difficult to completely avoid pigmentation after inflammation. Recent studies have found that 660nm LED light can prevent or even treat skin pigmentation that occurs after this inflammation, which will be a new research hotspot in the skin and beauty industry.


(3) Promote wound healing

It can be seen that LED light of various wavelengths in the near infrared can promote the growth of epithelial cells after trauma, and promote wound healing. At the same time, it also has a good therapeutic effect on the healing of chronic ulcers in the lower extremities of diabetic patients.


(4) Reduce inflammation

A series of studies have shown that LED has anti-inflammatory effects. Research has found that 635nm LED light can inhibit the release of the inflammatory mediator prostaglandin E2 (PGE2) by the fibroblasts of the gum, thereby reducing the inflammatory response of the gum. Before using pulsed dye laser to treat skin photoaging, if LED light source is used to irradiate in advance, it can reduce the discomfort of skin erythema, swelling and pain caused by dye laser. The use of LED light sources in advance of radiation therapy for breast cancer patients can reduce the side effects of radiotherapy.


(5) Scar prevention

Keloid keloids is a skin disorder that affects beauty and is difficult to treat clinically. It is caused by excessive proliferation of connective tissue after skin damage. Patients often have a scarring constitution. It started clinically as a small, hard red pimples, which slowly increased, producing round, oval, or irregular scars, higher than the skin surface, extending outward in the shape of a crab foot, with smooth and shiny skin, which may be accompanied by Pain, itching, etc. The clinical treatment is difficult and the effect is not ideal. Studies have found that LED can significantly improve the patient's pain, itching and other discomfort, make the scar flat, and have the advantages of non-invasive.


(6) Other functions

In addition, LED can also be used as a non-ultraviolet light therapy instrument, used in photodynamic therapy, hair loss treatment, skin damage reduction after ultraviolet irradiation, and so on.


In short, LED as a new type of light source has been gradually applied to dermatology. With the continuous innovation of LED lamps and the study of the biological effect of LED on medicine, the application of LED in dermatology will have unlimited prospects. . At the same time, LEDs have higher security and can be used more widely as home medical equipment.

LED Light Therapy Devices

Figure5. LED Light Therapy Devices

IV Procedure of Performing a LED Light Therapy

4.1 Perform a LED Light Therapy at a Professional’s Office

When getting an LED treatment, you really don’t have to do much but lie in a comfy bed with your face positioned directly under panels that emanated different colored lights. Generally, LED panels will be placed a few inches away from your face after microneedling or microdermabrasion. Each session lasts approximately 15-20 minutes. At first, it feels warm, and many people report it is really like the feeling of relaxation.

4.2 How to use At-home Devices?

Using at-home light therapy devices is like working out by yourself and things done in the office are like working out with a trainer. Both are good. But you’re not going to get as intense of a treatment at home. This means at-home LED devices may be more convenient, but they may be less effective than professional treatments.


When using an at-home device, it is important to follow the manufacturer’s instructions. These devices typically come in the form of a mask that a person applies to the face for several minutes or a wand that they use on the skin.


LED light therapy is suitable for use on any body part, including the face, hands, neck, and chest.

Following treatment, no recovery time is necessary.

Does LED Light Therapy Really Work? Can You Do it At HOME?

V LED Light Face Mask

5.1 Does LED Light Face Mask Work?

The LED mask was invented by John Tsagaris, a Chinese medicine doctor. It is understood that John has a degree in human biological sciences from Chinese Medicine, and also holds a graduate diploma in skin treatment and beauty care. LED blue light can play a bactericidal and anti-inflammatory effect to improve the surface skin, and has a good effect on the treatment of acne and rosacea. LED red light can promote the growth of skin collagen, for deep skin beauty care.


The working principle of LED mask is similar to photosynthesis. It treats skin folds from the depth by changing the energy of LED red light. It can not only calm the skin, but also prevent the growth of bacteria inside the skin. The use of LED mask masks not only does not have a claustrophobic feeling, but the LED red light delivered to the skin in large quantities can make people feel comfortable. Just wear the LED mask for 25 minutes every day, and the LED red light can gradually improve your skin.


According to a survey report from the United States, LED masks have a significant effect on eliminating wrinkles. Another report showed that 90% of people believe that LED mask can reduce skin aging, make the skin more delicate and smooth, and greatly improve the crow's feet, red blood, and melanin deposition in the corners of the eyes.

Depth of Light Energy Penetration

Figure6. Depth of Light Energy Penetration

5.2 Are LED Face Masks Safe?

Actually, it is the same concern as whether LED light therapy is safe. There’s no doubt that one of the most important aspects of LED phototherapy devices is their safety. Phototherapy with Light Emitting Diodes also points out that LEDs are nonablative and nonthermal, and when used alone (i.e., without topical photosensitizers in PDT applications) do not cause damage to the epidermis or dermal tissue.


There are no adverse events associated with the use of these devices and little to no downtime for the patient. When LED phototherapy is used alone, patients do not experience redness, peeling, blistering, swelling, or pain. In fact, patients can have a treatment during their lunch hour and return to work immediately afterwards.


While home use devices have been available for several years, there are many differences between those devices and those specifically designed for use by physicians. The home use devices necessarily deliver significantly less power and typically do not have light panel arrays large enough to treat the entire face at once, for example. As they often are hand-held, it might be cumbersome, time-consuming, and impractical to treat the entire face in a single session.


In contrast with the medical LED units and their protocols, home use devices have not been validated by controlled clinical studies published in peer-reviewed journals. In some cases, home units may be used adjunctively with dermatologist-provided treatment to address specific areas of concern, but they are dissimilar enough from the medical-grade units to not be considered an alternative to these tested technologies.

LED Face Masks
Figure7. LED Face Masks

VI Frequently Asked Questions

1. Does LED light therapy actually work?

LED light therapy appears to be a safe treatment for several skin conditions, including acne, skin aging, skin wounds, and other problems. Research indicates that this therapy offers promising results, although people should not expect a 100% improvement.


2. What does LED light therapy do?

LED light therapy is now used by some aestheticians to help regenerate the skin from aging. It's also used for acne. Your healthcare provider uses red or blue light frequencies based on the skincare concern. Red is primarily used for anti-aging, while blue is used for acne treatment.


3. Does LED light reduce wrinkles?

LED light therapy can stimulate collagen production, which reduces fine lines and wrinkles, as well as eliminate acne-causing bacteria, which improves skin clarity.


4. Can you overdo LED light therapy?

Light therapy cannot be overdone for most people. If you notice any extraordinary results, stop treatment, and contact your physician. For the best results, choose the right device style and LED color, and use it as directed.


5. Does red light therapy tighten loose skin?

Amber light stimulates collagen and elastin. Red light is most commonly used to promote circulation. White light penetrates the deepest and works to tighten and reduce inflammation. Blue light kills bacteria.


6. Are LED lights bad for your eyes?

New findings confirm earlier concerns that "exposure to an intense and powerful [LED] light is 'photo-toxic' and can lead to irreversible loss of retinal cells and diminished sharpness of vision," the French Agency for Food, Environmental and Occupational Health & Safety (ANSES) warned in a statement.


7. Are led masks effective?

The research behind LED masks is centered on the lights used, and if you're going on those findings, LED masks can be beneficial to your skin.


8. What are the side effects of red light therapy?

Red light therapy is considered safe and painless. However, there have been reports of burns and blistering from using RLT units. A few people developed burns after falling asleep with the unit in place, while others experienced burns due to broken wires or device corrosion.


9. Is red light therapy the same as laser therapy?

In clinical practice, low-level laser (LLT) therapy involves exposing tissues to red and near infrared (NI) light, which are lower in energy than the lasers used in surgery.


10. How long does it take for light therapy to work?

Light therapy can start to improve symptoms within just a few days. In some cases, though, it can take two or more weeks.

Ordering & Quality

Photo Mfr. Part # Company Description Package PDF Qty Pricing
STPS1545D STPS1545D Company:STMicroelectronics Remark:Schottky Diodes & Rectifiers 15 Amp 45 Volt Package:N/A
In Stock:On Order
1+: $0.90000
10+: $0.76600
100+: $0.57500
250+: $0.55700
500+: $0.48700
1000+: $0.39700
2000+: $0.38500
5000+: $0.35600
10000+: $0.33900
2N5551 Company:Central Semiconductor Remark:Bipolar Transistors - BJT NPN Gen Pur SS Package:N/A
In Stock:On Order
1+: $0.83000
10+: $0.68100
100+: $0.56700
500+: $0.43800
1000+: $0.39500
2500+: $0.35100
10000+: $0.33700
25000+: $0.32700
ULN2004AN ULN2004AN Company:Texas Instruments Remark:Darlington Transistors Hi V & A Darlington Package:N/A
In Stock:On Order
1+: $0.65000
10+: $0.53700
100+: $0.39000
250+: $0.37600
500+: $0.32600
1000+: $0.27700
2500+: $0.26000
5000+: $0.23400
10000+: $0.21700
1N5817 1N5817 Company:STMicroelectronics Remark:Schottky Diodes & Rectifiers Vr/20V Io/1A BULK Package:N/A
In Stock:On Order
1+: $0.38000
10+: $0.26000
100+: $0.12100
1000+: $0.09400
2000+: $0.08200
10000+: $0.07300
24000+: $0.07200
50000+: $0.06100
100000+: $0.05900
MMSZ4699T1G MMSZ4699T1G Company:ON Semiconductor Remark:Zener Diodes 12V 500mW Package:N/A
In Stock:On Order
1+: $0.21000
10+: $0.18300
100+: $0.06300
1000+: $0.04400
3000+: $0.03400
9000+: $0.02900
24000+: $0.02700
45000+: $0.02300
99000+: $0.02100
STW88N65M5 STW88N65M5 Company:STMicroelectronics Remark:MOSFET N-Ch 650V 0.024 Ohm 84A MDMesh M5 Package:N/A
In Stock:On Order
1+: $13.30000
10+: $12.22000
25+: $11.71000
100+: $10.13000
250+: $9.81000
500+: $9.18000
1000+: $8.42000
STW4N150 STW4N150 Company:STMicroelectronics Remark:MOSFET N-channel 1500 V PowerMesh Package:N/A
In Stock:On Order
1+: $6.62000
10+: $5.70000
100+: $4.73000
250+: $4.45000
500+: $4.17000
1000+: $3.75000
2500+: $3.61000
ULN2004A ULN2004A Company:STMicroelectronics Remark:Darlington Transistors Seven NPN Array Package:N/A
In Stock:On Order
1+: $0.53000
10+: $0.41900
100+: $0.26400
500+: $0.24900
1000+: $0.18600
2000+: $0.16200
10000+: $0.15500
25000+: $0.15200
50000+: $0.14700

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pinglun 1 comment

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    • Erica Mccollum on 2020/8/6 3:27:58

    This article is a source of inspiration, I recommend it. Thanks and keep it up!

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