STYLPRO Wavelength LED Face Mask

Radiate confidence.

Uncover a radiant and youthful complexion with the STYLPRO Wavelength LED Face Mask. This hands free, wearable device harnesses the power of LED lights, with 4 different modes, to target your skincare needs.

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Leading LED Therapy expert Dr. Abs recommends to use to use it daily.

Want to know more?

What are the modes?

Mode 1: Anti-ageing

The Anti-ageing mode has red LED light with a wavelength of 633nm and
near-infrared light with a wavelength of 830nm. This mode provides a
rejuvenating and revitalizing experience for your skin. Red LED light can help
to stimulate collagen production, a protein responsible for younger looking
skin.

 

Mode 2: Target

The Target mode has blue LED light with a wavelength of 415nm. Blue LED
light helps target spots and blemishes leaving your complexion clearer.

 

Mode 3: Recovery

The Recovery mode has near-infrared with a wavelength of 830nm. Infrared
can help reduce inflammation and boost overall skin health.

 

Mode 4: Balance

The Balance mode is a combination of red LED light with a wavelength of 633nm, blue LED light with a wavelength of 415nm and near-infrared with a wavelength of 830nm. This mode can help to reduce inflammation, to stimulate collagen production and is the perfect mode for an overall boost for the skin. This mode
has the highest amount of light energy of all 4 modes.

Benefits

⭐Safe and natural
⭐Non-invasive
⭐Helps reduce appearance of fine lines and wrinkles
⭐Helps improve skin texture
⭐Spot and blemish control
⭐Customised skincare routine
⭐Time efficient sessions
⭐Versatile for all skin types

Features

⚡Red LED light (633nm)
⚡Blue LED light (415nm)
⚡Near Infrared (830nm)
⚡62mW/cm2 - 129 mW/cm2
⚡44J/cm2 - 77J/cm2
⚡4 different modes
⚡10 minute sessions
⚡Flexible silicone
⚡Rechargeable
⚡Remote to adjust modes
⚡Automatic timer
⚡User friendly controls

How do you use it?


🖤HOW TO ASSEMBLE:

- Insert the USB-C cable (provided) into the port at the top of the remote.
- Attach to a USB-C friendly power source. The battery icon will show a loading sequence when charging.

 
🖤HOW TO USE:

- Once your LED Face Mask is fully assembled, place the LED Face Mask onto your face and securely attach the straps around the crown of your head.

- Long press the On/Off button on the remote This will turn on to the 'Anti-ageing' mode.

- Short press the Mode button to switch to the 'Target' mode.

- Short press the Mode button to switch to the 'Recovery' mode.

- Short press the Mode button to switch to the 'Balance' mode.

- Once you have chosen your preferred Mode, enjoy a 10 minute session.

- To turn off your LED Face Mask before you have completed your 10 minute session, long press the On/Off button.

What do you get in the box?

✔️1 x STYLPRO Wavelength LED Face Mask
✔️1 x USB-C Cable
✔️2 x Silicone Eye Comfort Pads
✔️2 x Adjustable Mask Straps

Get your own STYLPRO Wavelength LED Face Mask delivered straight to your door

Shop now
STYLPROTM
Wavelength
Competitor #1 Competitor #2 Competitor #3 Premium
Professional
Treatment

Wavelengths
(Colour of light in nm)
415nm 633nm 830nm 633nm 830nm 415nm 605nm 630nm 880nm 415nm 633nm 830nm 415nm 633nm 830nm
Price £99 £299 £370 £549 £60 per treatment
LEDs 360 LEDs 132 LEDs 100 LEDs 648 LEDs >1000 LEDs
Energy
(Light energy per second)
67 - 129 mW/cm² 30 mW/cm² 35 mW/cm² 55 - 73 mW/cm² 26 - 200 mW/cm²
Fluence
(Total light per treatment)
37 - 77 J/cm² 18 J/cm² 11 J/cm² 10 - 13 J/cm² 8 - 240 J/cm²
Dermatologist
Recommended
Comments Engineered for optimal
performance & price
Market leader Developed by a Doctors Well engineered Professional market leader
Main Image
Image

Anti-ageing

The “Anti-ageing” is based upon a large body of research which has clinically shown combined 633nm red and 830nm near-infrared light to reduce wrinkles, increase collogen production, improve skin texture, reduce hyperpigmentation, and boost the local metabolism of the skin. This setting provides a much higher dosage of light compared to almost all competitor masks and is much closer to the high-end spa devices and medical devices used by professionals and dermatologists..This mode has been designed to distrobute light evenly accross the face, utilised 120 633nm red LEDs and 120 830nm near-infrared LEDs.

Image 633nm / 830nm

"Anti-ageing" Mode

Colour Wavelength (nm) Irradiance (mW/cm2) Fluence (J/cm2) Total Fluence (J/cm2)
Red 633nm +/- 2.5 53.6 32.2 44
Near-infrared 830nm +/- 2.5 18.9 11.3
Colour
Red
Near-infrared
Wavelength (nm)
633nm +/- 2.5
830nm +/- 2.5
Irradiance (mW/cm2)
53.6
18.9
Fluence (J/cm2)
32.2
11.3
Total Fluence (J/cm2)
44
Durration: 10 minutes
Image

Target

The “Target” mode has been designed to provide high levels of 415nm blue light and 830nm near-infrared light. Blue light, specifically 415nm, has been clinically shown to target and kill acne-causing bacteria on the skin. Near-infrared light at 830nm has been clinically shown to significantly reduce inflimation in the skin boosting the healing process, or in the case of ance, addressing inflamitory (red and angry look) acne. A total of 240 LEDs are used to cover the whole face in evenly distributed blue and near-infrared light. This mode excludes red light because red light can either have beneficial or detrimental effects on acne depending on the individual.

Image 415nm / 830nm

"Target" Mode

Colour Wavelength (nm) Irradiance (mW/cm2) Fluence (J/cm2) Total Fluence (J/cm2)
Blue 415nm +/- 2.5 44 26.4 37
Near-infrared 830nm +/- 2.5 17.8 10.7
Colour
Blue
Near-infrared
Wavelength (nm)
415nm +/- 2.5
830nm +/- 2.5
Irradiance (mW/cm2)
44
17.8
Fluence (J/cm2)
26.4
10.7
Total Fluence (J/cm2)
37
Durration: 10 minutes
Image

Recovery

The “Recovery” mode is for theraputic benefits to the skin, utilising a large amount of 830nm near-infrared light mixed with a small amount of 633nm red light. Near-infrared light has been used for the clinical treatment of wounds for decades, where is has demonstrated a very large reduction in recovery time and improvement in wound healing. This mode is for theraputic purposes only and should not be used to treat any medical condition, when using with a wound or skin condition please consult a doctor.

Image 830nm / 633nm

"Recovery" Mode

Colour Wavelength (nm) Irradiance (mW/cm2) Fluence (J/cm2) Total Fluence (J/cm2)
Red 633nm +/- 2.5 10.5 6.3 40
Near-infrared 830nm +/- 2.5 56.1 33.7
Colour
Red
Near-infrared
Wavelength (nm)
633nm +/- 2.5
830nm +/- 2.5
Irradiance (mW/cm2)
10.5
56.1
Fluence (J/cm2)
6.3
33.7
Total Fluence (J/cm2)
40
Durration: 10 minutes
Image

Balance

The “Balance” mode was designed to mix 415nm blue, 633nm red, and 830nm near-infrared light in nearly equil parts. This mode provides a reduced intensity when compaired to the other 3-modes. The other 3 modes were designed to be taylored specifically for different issues whereas this mode is design to combine the benefits of all mode into one and is for individuals that have no major underlying skin conditions.

Image 415nm / 633nm
/ 830nm

"Balance" Mode

Colour Wavelength (nm) Irradiance (mW/cm2) Fluence (J/cm2) Total Fluence (J/cm2)
Blue 415nm +/- 2.5 42.8 25.7 77
Red 633nm +/- 2.5 44.9 26.9
Near-infrared 830nm +/- 2.5 41.2 24.7
Colour
Blue
Red
Near-infrared
Wavelength (nm)
415nm +/- 2.5
633nm +/- 2.5
830nm +/- 2.5
Irradiance (mW/cm2)
42.8
44.9
41.2
Fluence (J/cm2)
25.7
26.9
24.7
Total Fluence (J/cm2)
77
Durration: 10 minutes

The Sciency Bit

Understand light therapy and all of its benefits.

01
Optimal Design

The STYLPROTM Wavelength was developed with the classic STYLPRO ethos, to design the best possible solution at the best possible price. Our LED mask has been tailored to provide maximum results and best-in-class build quality, while keeping our margins low and providing the consumer with a reasonably priced premium product. Our engineers have poured over every last detail to make this mask more comfortable, more effective, and in-line with premium light therapy treatment devices normally reserved for dermatologist and high-end spas. This economically priced mask provides best-in-class power and is sure to disrupt the overpriced LED mask market.

Your Image

Figures 1-3. Development of the STYLPROTM Wavelength (prototype, ideation & testing).

02
LEDs

LED stands for Light Emitting Diode and is the same technology that lights much of the world around us. LEDs produce light very efficiently when electricity is applied to them, but not all LEDs are the same. Our LED mask contains custom LEDs designed to meet the precise requirements to be in-line with premium medical and high-end spa LED therapy equipment. Our mask is among the few LED masks that meet these stringent requirements of wavelength, peak tolerance, and peak half-width tolerance. Our mask contains a large number of these LEDs in order to provide a high amount of energy, higher than almost all competitor masks and matching that of a moderate spa-level treatment. All of the most popular LED masks currently on the market provide much lower energy levels and are in-line with a low-level spa treatment. The quantity of LEDs doesn’t not determine how effective an LED mask is, rather the brightness and distribution of light are the key factors in the performance of an LED mask. Judging a mask based on the number of LED is also misleading because many masks have a large quantity of LEDs due to them having a large variety of colours, most of which are completely ineffective and purely marketing. The STYLPROTM Wavelength has been designed with 120 chips which each hold 3 LEDs, blue, red, and near-infrared, making a total of 360 LEDs when all are functioning. We use 120 chips rather than the more common 60 chips used by market leaders because this distributes the light more evenly across the face and reduces the effects of heat that can cause the LEDs to perform inefficiently.

03
Light Therapy Safety

Light therapy has been demonstrating significant benefits to improving skin wrinkles, acne, and overall skin health for decades. These finding were first alluded to back in 1971 where a scientist tried to test if high doses of red light was harmful to the skin, but found that the opposite was true, and that red light showed real promise for improving skin health [1]. Fast forward a few decades to the early 2000’s and red and near-infrared light were being implemented in medical-grade equipment and clinically proving that they could improve the texture, wrinkles, and photoaging of skin. Back in 2005, a large medical-grade device was tested with doses of up to 126J/cm2 as was demonstrated safe and effective results in improving the facial complexion [2]. Comparing this to our STYLPROTM Wavelength LED Mask, these ultra-high power panels provided 4x higher fluence and 1-2x the intensity compared to our mask. Although the STYLPROTM Wavelength outperforms almost all at-home light therapy devices currently on the market, it is still an at-home device and is much less powerful and much safer than the best in-class machines seen in high-end spas and dermatologists. The gold standard for LED therapy is the Dermalux Tri-Wave MD and it is about as strong as it gets with a maximum combined fluence of 200 J/cm2. At a maximum combined fluence of 77 J/cm2, our experts are confident that the STYLPROTM Wavelength is safe to for every-day, at-home use.

Your Image

Figures 1-3. Development of the STYLPROTM Wavelength (prototype, ideation & testing).

It was demonstrated that combining blue and red light could also benefit acne [7] [8] due to the increased wound healing ability of red light. The STYLPROTM Wavelength “Target” mode was designed to be used with acne prone skin base based on the research supported benefits of blue and near-infrared light whereas the “Balance” mode was designed to be used for overall healthy skin with no major issue. This is because Red can have both a positive or a negative effect on Acne depending on the severity and the cause […………..] due to the inflammatory nature of red light. This is why a dermatologist should used when actively attempting to treat moderate-severe acne since a dermatologist can recommend how to leverage LED therapy to get the best results and how to assess what wavelengths would work best. Note that the STYLPROTM Wavelength is a non-medical device and is not to be used to treat skin conditions and should only be used if skin conditions are present when advised by a dermatologist.

04
Understanding Light Therapy

Light therapy is a well establish technologies and has been used for medical and therapeutic use for quite some time. White light, 415nm (a shade of blue), 633nm (a shade of red), 830nm (a shade of near-infrared light), and many more spectra have all demonstrated great therapeutic benefits. Specifically, 415nm, 633nm and 830nm have all been shown to be stand-out wavelengths for improving facial complexions. Light therapy has been rigorously studied and some wavelengths, such as those mentions, have been clinically proven to give benefits when given in sufficient dosages. The energy is always measured in mW/cm2 and the energy dosage / fluence is measured in J/cm². It is crucial to understand that the effectiveness of light therapy is contingent upon the dosage, distribution, and quality of the light source. Most commercially available LED masks offer an extremely low dosage compared to professional, spa-level, or clinical devices, which can affect their therapeutic efficacy. Many of these market leading devices are based upon 10-15 year old designs and are limiting themselves to cost effective solutions. Often, these commercially available LED masks utilise off-the-shelf LEDs that provide sub-optimal wavelengths of light, and some of those with the correct wavelengths have insufficient tolerances of both the peak wavelengths and broadness of the wavelengths, meaning that they may be providing sub-optimal performance irrespective of the dosage.

Another Image

Others are providing high quality wavelengths, but are using low-power LEDs and are only barely giving an efficacious dose of light. The STYLPROTH Wavelength provides on average 2-3x the dose compared to its much more expensive competitors while maintaining ideal wavelengths and good light distribution. At a basic level, to understand why these different wavelengths provide different benefits, we have to understand how these wavelengths interact with the skin. As light passes through the skin, it is absorbed more and more as it penetrates deeper. Blue light is penetrating up to around 0.25mm into the skin meaning that it targets the surface layers of the skin where bacteria live. Red light penetrates around 1-3mm into the skin allowing it to target the layers of the skin with cologne. Near-infrared light penetrates even deeper to a depth of 2-5mm, this allows it to target deep into the skin where it can aid in healing and inflammation reduction. This is why, when shining a white light through your hand, your hand glows red. While most of the light is absorbed in your hand, the small amount of light that makes it through is a deep red colour, the highest wavelength that the human eye can see.

05
Blue Light Therapy

Blue Light Therapy has been shown to help treat acne, particularly 415nm blue light. The wavelength of 415nm has been clinically proven to improve acne and has been shown in repeatedly to improve acne and kill acne causing bacteria. Blue light effects the bacteria by creating reactive oxygen species inside the bacteria on the surface of the skin which causes oxidative stress ultimately killing the bacteria [3]. One trial in 2000 tested 107 participants and found that 415nm blue light as well as combined red & blue light significantly improved inflammatory lesion, white heads, and black heads and was comparable or better than 5% benzoyl peroxide, one of the most common acne treatments [4]. Similar results were found in [5], where patients saw a significant reduction of whiteheads and blackheads after only 7 days of use with even better results after 28 days. Blue light has also been known to reduce inflammation and combined with near-infrared light which can also boost circulation, one study was shown to reduce pore size and increase skin radiance in 90% of patients, smooth patients skin, and dramatically accelerate post-surgery healing and reduce post-surgery pain [6]. It was demonstrated that combining blue and red light could also benefit acne [7] [8] due to the increased wound healing ability of red light. The STYLPROTM Wavelength “Target” mode was designed to be used with acne prone skin base based on the research supported benefits of blue and near-infrared light whereas the “Balance” mode was designed to be used for overall healthy skin with no major issue.

Your Image

This is because Red can have both a positive or a negative effect on Acne depending on the severity and the cause […………..] due to the inflammatory nature of red light. This is why a dermatologist should used when actively attempting to treat moderate-severe acne since a dermatologist can recommend how to leverage LED therapy to get the best results and how to assess what wavelengths would work best. Figures 1-3. Development of the STYLPROTM Wavelength (prototype, ideation & testing).

Note that the STYLPROTM Wavelength is a non-medical device and is not to be used to treat skin conditions and should only be used if skin conditions are present when advised by a dermatologist.

06
Red Light Therapy

Red Light Therapy has been shown multiple benefits such as increased collagen production, hyperpigmentation, skin texture, wrinkle reduction, reduced hyperpigmentation, and many more benefits. Red light is often paired with near-infrared light [9] [2] to leverage the complimentary effects of the near-infrared light and the different penetration depths of the different wavelengths. Red light has demonstrated improved fibroblast activity and collogen density in 128 people using dosages of 8.5 – 9.6 J/cm2 [10], 3-4x less than the STYLPROTM Wavelength Anti-ageing mode. These patients saw improved skin complexion, skin feeling, and collagen intensity from the treatments and continued to see beneficial results even past 60 days of use. On top of significant improvements in skin smoothness and wrinkle reduction, combined red (633nm) and near-infrared (830nm) light [2] was able to improve photoaging, helping to reduce damaging induced by UV damage from the sun.

Another Image

This combination of 633nm and 830nm was tested against the individual wavelengths on their own in [9] and it was shown that results were varied with 633nm having the largest impact of skin pigmentation, 830nm improving skin elasticity the most, and the combined wavelengths achieving the best results for wrinkle reduction; however, other research has demonstrated slightly differing results, but a constant is that both red light and combined red and near-infrared light is extremely beneficial for producing anti-ageing effects in the skin. Near-infrared light has also repeatedly demonstrated anti-inflammatory effects [………….] which could be beneficial when paired with red light since a small amount of inflammation can occur from using red light alone […………….]. The STYLPROTM Wavelength uses a combined 633nm and 830nm red / near-infrared combined light to achieve be best in line with the research we have conducted and the best-in-class medical-grade devices.

Note that the STYLPROTM Wavelength is a non-medical device and is not to be used to treat skin conditions and should only be used if skin conditions are present when advised by a dermatologist.

07
Near-Infrared Light Therapy

Near-infrared Light Therapy has been repeatedly shown to assist in healing wounds. This technology has been used in a clinical settings for decades. Near-infrared light and red light have both been shown to be beneficial for wound healing by increasing mast cell count and degranulation [11]. This means that the light results in the body accelerating all stages of the healing process with reduced inflammation and by regulating the immune response and fibroblast growth of a wound [12]. Red light can cause inflammatory effects and should be used with caution on wounded skin [……………]. This review evaluated 48 studies on animals and in vitro and it was clear that light therapy, predominantly those in the red to near-infrared wavelengths, were well established to promote wound healing by mechanisms such as reducing inflammation and increasing tissue regeneration. The STYLPROTM Wavelength “Recovery” mode was designed as a therapeutic mode with a substantial amount of near-infrared light with a small amount of red light. The specific wavelength of near-infrared light is important to obtain beneficial results. The wavelengths 810-830nm, 830nm is used in the STYLPROTM Wavelength, leverages characteristics of the skin and penetrates the deepest. The intensity of near-infrared has also been shown to be important where there is a sweet-spot for beneficial effects, this sweet-spot is around the intensity that is given off by the sun, 30-35 mW/cm2. The STYLPROTM Wavelength uses varying intensities of near-infrared light depending on the mode and are all are within +/- 60% of this solar intensity [13]. Note that the STYLPROTM Wavelength is a non-medical device and is not to be used to treat wounds or skin conditions and should only be used if skin conditions or wounds are present when advised by a dermatologist.

Your Image

Figures 1-3. Development of the STYLPROTM Wavelength (prototype, ideation & testing).

06
Other Light Therapy

As of June 2024, there is insubstantial evidence to suggest that any other spectrum of light provides significant benefits to the skin that is comparable to red, blue, and near-infrared light. The light wavelengths of 415nm (blue), 633nm (red), and 830nm(near-infrared) are all clinically proven to provide significant benefits to the skin for acne, anti-aging, and anti-inflammatory, respectively. This is not to say that other spectrums likely do not provide any benefits, but rather suggests that these three wavelengths are likely superior to the rest in terms of the specified benefits based on a substantial body of research.

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References

[1] E. Mester MD, T. Spiry MD, B. Szende MD and J. G. Tota Dipl lng, “Effect of laser rays on wound healing,” The American Journal of Surgery, vol. 122, no. 4, pp. 532-535, 1971.

[2] B. A. Russell, N. Kellett and L. R. Reilly, “A study to determine the efficacy of combination LED light therapy (633 nm and 830 nm) in facial skin rejuvenation,” Journal of Cosmetic and Laser Therapy, vol. 7, p. 196–200, 2005. doi: 10.1080/14764170500370059

[3] R. Lubart, A. Lipovski, Y. Nitzan and H. Friedmann, “A POSSIBLE MECHANISM FOR THE BACTERICIDAL EFFECT OF VISIBLE LIGHT,” Laser therapy, vol. 20, no. 1, pp. 17-22, 2011. doi: 10.5978/islsm.20.17

[4] P. Papageorgiou, A. Katsambas and A. Chu, “Phototherapy with blue (415 nm) and red (660 nm) light in the treatment of acne vulgaris,” British Journal of Dermatology, vol. 142, pp. 973-978, 2000.doi: 10.1046/j.1365-2133.2000.03481.x

[5] M. H. Gold, A. Andriessen, J. Biron and H. Andriessen, “Clinical Efficacy of Self-applied Blue Light Therapy for Mild-to-Moderate Facial Acne,” The Journal of clinical and aesthetic dermatology, vol. 2, no. 3, p. 44, 2009.

[6] G. Lask, N. Fournier, M. Trelles, M. Elman, M. Scheflan, M. Slatkine, J. Naimark and Y. Harth, “The utilization of nonthermal blue (405–425 nm) and near infrared (850–890 nm) light in aesthetic dermatology and surgery—a multicenter study,” Journal of Cosmetic and Laser Therapy, vol. 7, no. 3-4, pp. 163-170, 2005.

[7] S. Y. Lee, C. E. You and M. Y. Park, “Blue and red light combination LED phototherapy for acne vulgaris in patients with skin phototype IV,” Lasers Surg Med, vol. 39, no. 2, pp. 180-8, 2007.

[8] D. J. Goldberg and B. A. Russell, “Combination blue (415 nm) and red (633 nm) LED phototherapy in the treatment of mild to severe acne vulgaris,” Journal of Cosmetic and Laser Therapy, vol. 8, p. 71–75, 2006.

[9] S. Y. Lee, K.-H. Park, J.-W. Choi, J.-K. Kwon, D. R. Lee, M. S. Shin, J. S. Lee, C. E. You and M. Y. Park, “A prospective, randomized, placebo-controlled, double-blinded, and split-face clinical study on LED phototherapy for skin rejuvenation: clinical, profilometric, histologic, ultrastructural, and biochemical evaluations and comparison of three different...,” Journal of Photochemistry and Photobiology B: Biology, vol. 88, no. 1, pp. 51-67, 2007.

[10] A. Wunsch and K. Matuschka, “A Controlled Trial to Determine the Efficacy of Red and Near-Infrared Light Treatment in Patient Satisfaction, Reduction of Fine Lines, Wrinkles, Skin Roughness, and Intradermal Collagen Density Increase,” Photomedicine and Laser Surgery, vol. 32, no. 2, pp. 93-100, 2014.

[11] S. O. el Sayed and M. Dyson, “Comparison of the effect of multi-wavelength light produced by a cluster of semiconductor diodes and of each individual diode on mast cell number and degranulation in intact and injured skin,” Lasers Surg Med, vol. 10, no. 6, pp. 559-68, 1990.

[12] G. R. Calderhead, J. Kubota, M. A. Trelles and T. Ohshiro, “One mechanism behind LED phototherapy for wound healing and skin rejuvenation: Key role of the mast cell,” Laser Therapy, vol. 17, no. 3, pp. 141-148, 2008.

[13] D. Barolet, “Near-Infrared Light and Skin: Why Intensity Matters,” Challenges in Sun Protection, vol. 55, pp. 374-384, 2021.

[14] M. E. D. A. Chaves, A. R. D. Araújo, A. C. C. Piancastelli and M. Pinotti, “Effects of low-power light therapy on wound healing: LASER x LED”.

[15] T. Walski, K. Dąbrowska, A. Drohomirecka, N. Jędruchniewicz, N. Trochanowska-Pauk, W. Witkiewicz and M. Komorowska, “The effect of red-to-near-infrared (R/NIR) irradiation on inflammatory processes,” International Journal of Radiation Biology, vol. 95, no. 9, pp. 1326-1336, 2019.

[16] D. Barolet, F. Christiaens and M. R. Hamblin, “Infrared and skin: Friend or foe,” Journal of Photochemistry and Photobiology B: Biology, vol. 155, pp. 78-85, 2016.

[17] G. Ablon, “Phototherapy with Light Emitting Diodes: Treating a Broad Range of Medical and Aesthetic Conditions in Dermatology,” The Journal of clinical and aesthetic dermatology, vol. 11, no. 2, pp. 21-27, 2018.

[18] W. S. Kim and R. G. Calderhead, “Is light-emitting diode phototherapy (LED-LLLT) really effective?,” Laser therapy, vol. 20, no. 3, pp. 205-215, 2011.

[19] M. Ulrich, U. Reinhold, R. Dominicus, R. Aschoff, R. M. Szeimies and T. Dirschka, Journal of the American Academy of Dermatology, vol. 85, no. 6, pp. 1510-1519, 2021.

[20] R. A. Weiss, D. H. McDaniel, R. G. Geronemus, M. A. B. K. L. Weiss, G. M. Munavalli and B. S. G, “Clinical experience with light-emitting diode (LED) photomodulation,” Dermatologic surgery, vol. 31, pp. 1199-1205, 2005.

[21] R. A. Weiss, D. H. McDaniel, R. G. Geronemus and M. A. Weiss, “Clinical Trial of a Novel Non-Thermal LED Array for Reversal of Photoaging: Clinical, Histologic, and Surface Profilometric Results,” Lasers in Surgery and Medicine, vol. 36, pp. 85-91, 2005.

[22] B. A. Russell, N. Kellett and L. R. Reilly, “A study to determine the efficacy of combination LED light therapy (633 nm and 830 nm) in facial skin rejuvenation,” Journal of Cosmetic and Laser Therapy, vol. 7, pp. 196-200, 2005.