LED Light Therapy Colour Benefits – The Science Explained
LED Light Therapy has grown to become one of Australia’s most popular skin treatments, both as a stand-alone service and an effective add-on option to enhance the results of other services. But did you know that not all LED light therapies are made the same? Here we explore everything you need to know about LED light therapy colour benefits, their various uses, and how you can use these to your advantage to achieve your best skin yet.
The colour spectrum of light
When we think of LED light therapy, we must also think of the spectrum of light, where each colour on the spectrum is determined by its wavelength (measured in nanometres). We refer to this as the visible spectrum of light. There are also wavelengths that can’t be seen by human eyes, such as infrared or ultraviolet light. When it comes to LED as an aesthetic treatment, most people understand LED to act as a powerful skin rejuvenating tool, but this isn’t its only role. There are countless other benefits that LED can offer, depending on which wavelength of light is selected, as every wavelength has a different action in the skin and varies in the depth it can penetrate. Some LED devices offer just one wavelength, and others offer multiple. These can sometimes then be combined together to reap the benefits offered by both wavelengths at the same time.
There are countless LED light therapy devices on the market, and you may see several different colours being utilised, including red LED light, green LED light, yellow LED light, blue LED light, even pink; a combination of blue and red LED light. Here at The Aesthetic Bureau, we harness the power of wavelengths whose results are backed by countless years of research and clinical trials. These include:
Blue light therapy
Blue light in the wavelength range of 405–470nm has been demonstrated as an effective treatment against acne, breakouts and problematic skin, as it exhibits anti-microbial properties. Blue LED is the clinically accepted approach for targeting Propionibacterium acnes – the species of bacteria largely responsible for acne breakouts. 
Red light therapy
630nm red light therapy benefits have been shown to include the stimulation of fibroblast growth factors in the dermis; the cells responsible for the production of collagen and elastin. This makes red LED light therapy an ideal treatment selection for those concerned with skin ageing, thinness, or loss of structure and elasticity. 
Yellow light therapy
Yellow light with a wavelength of 585nm has been indicated when treating superficial pigmentation concerns with LED, including melasma. Yellow Light at 585nm and NIR at 830nm have been shown to reduce melanin content and tyrosinase activity – put simply, they slow the activity of physiological processes required in the production of pigment. While Yellow light therapy can be utilised for very superficial applications, NIR 830nm is the chosen approach when treating pigmentation concerns due to its greater depth of penetration. 
Green light therapy
Green Light with a wavelength of 520nm anecdotally (like Yellow Light Therapy) has also been indicated for treating superficial pigmentation concerns with LED, additionally Green light therapy has shown subtle levels of additional textural improvements of skin due to boosting of ATP production in superficial cells of the epidermis. However due to the poor penetration of Green Light energy, Red Light Therapy at 633nm or NIR at 830nm are the preferred options.
Near Infra-red (NIR) light therapy
Near-infrared LED, in the wavelength range of 770–1200nm, has shown to boast similar benefits as red LED, but with a few unique actions of its own. This wavelength is also absorbed by our mitochondria, the ‘energy powerhouse’ components of our cells that produce ATP. ATP is our body’s natural fuel, and the source of energy required by our cells to perform all of their functions, including our skin cells. Stimulating ATP is a means of energising the skin and improving tone and texture, simply by speeding up its functions and stimulating cell proliferation. 
In addition to fibroblast activation and mitochondrial stimulation, near-infrared light is often used for anti-inflammatory purposes, as it has an effect on mast cell degranulation, leukocytes and macrophages; which are all involved in our body’s natural inflammatory response.  Influencing these cells can reduce the inflammation faster, thereby hastening the healing process. This is why near-infrared and infrared light therapy have been used for many years in the treatment of sports injuries including muscle trauma and tissue wounds, athletes looking to improve their performance, and as post-surgical healing tool. This use of near-infrared and infra-red light is often also referred to as photobiomodulation.
Photobiomodulation (PBMt) involves the use of red infrared light therapy to stimulate healing, relieve pain, and reduce inflammation. Although used popularly for cosmetic purposes, photobiomodulation is a therapeutic application widely accepted by the health community. This combination of light not only reduces inflammatory mediators in tissue, but can also up-regulate antioxidant defenses and reduce oxidative stress. Oxidative stress is often the cause of inflammation which can lead to all kinds of inflammatory conditions throughout the body, from the skin to the joints; AKA., arthritis.
If all of these benefits weren’t enough, Australian researchers have recently demonstrated PBMt can beneficially increase healthy gut microbiome diversity in humans. Since the microbiome is strongly correlated with many diseases related to metabolism, obesity, cardiovascular and neurodegenerative disorders, PBMt shows great promise as a treatment or preventive measure for many of the most common health problems including diseases of aging. 
Where does sunlight and UV sit on the spectrum?
Ultraviolet light, part of the invisible light spectrum, is broken down into several classifications according to its wavelength. UVA is measured at 315-400nm, UVB at 280-315nm, and UVC 100-280nm. While UVB can cause skin burning and UVC is largely responsible for mutations leading to cancer, exposure to ultraviolet light in the A wavelength region is incredibly important for our health, as this is the spectrum of light that leads to vitamin D synthesis. However, depending on fitzpatrick skin type, many of us require as little as 10 minutes in the sun in order to achieve our daily recommended dose.
Aesthetic Bureau’s Xen LED
Our medical grade, professional-only Xen LED device proudly utilises both blue antibacterial wavelengths as well as red and near-infrared for skin rejuvenation and anti-ageing. Thanks to the long list of benefits offered by these wavelengths, our partner salons and clinics can offer treatment to a wide range of skin concerns, from acne and breakouts to ageing, lines and wrinkles, loss of volume, and skin healing after advanced treatments such as chemical peels, microneedling, injectables like anti-wrinkle and dermal filler, and post-surgical care. Xen’s adjustable LED panels also mean that it can be completely extended to 180 degrees, allowing the operator to treat large areas like the back or the legs, unlike most other devices on the market. So if you’re seeking treatment of sports injuries, muscle inflammation, or soreness throughout the back or spine, you can do so by visiting a clinic that offers our Xen LED.
Aesthetic Bureau devices are proudly Australian made, certified (ISO 13485:2016) and TGA approved. If you wish to learn more about our Xen LED, you can reach us via 1300 858 711 or
firstname.lastname@example.org, or click here to find a Xen clinic near you.
 Blue light for infectious diseases: Propionibacterium acnes, Helicobacter pylori, and beyond? https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3438385/
 Photodynamic and photobiological effects of light-emitting diode (LED) therapy in dermatological disease: an update
 Light-emitting diode 585nm photomodulation inhibiting melanin synthesis and inducing autophagy in human melanocytes
 Local and systemic effects of low-level light therapy with light-emitting diodes to improve erythema after fractional ablative skin resurfacing: a controlled study
 Mechanisms and applications of the anti-inflammatory effects of photobiomodulation
 “Photobiomics”: Can Light, Including Photobiomodulation, Alter the Microbiome?