Understanding LED Light Therapy

LED (light-emitting diode) light therapy is a type of phototherapy that uses low-level wavelengths of light to treat a variety of skin conditions and improve overall skin health.

LED light therapy works through a process called photobiomodulation. Light energy is absorbed by mitochondria (the cells powerhouse). This boosts ATP (adenosine triphosphate) production, giving cells more energy. More energy = Faster cell turnover, better healing and stronger skin barrier.

What does LED therapy do?

LED therapy is an effective way of treating a number of skin concerns such as acne, dullness and redness. If you have autoimmune issues such as rosacea, eczema or inflammation then LED therapy can help reduce these symptoms.

YES...

BUT not all LED devices are created equal. 
Some fail to deliver the wavelength needed for stimulating cellular responses. When choosing for the right home - use LED mask, the amount of light emitted from the bulbs really does make all the difference. 

When selecting an LED face mask, one of the most important factors is the irradiance - the amount of light energy delivered to the skin, measured in mW/cm2 (milliwatts per square centimeter). This determines how effectively the light can stimulate biological processes in the skin.

Therapeutic Dose and Effectiveness

Light therapy works through photobiomodulation, where light at specific wavelengths stimulates cellular functions, there is a therapeutic window - too little energy wont trigger a biological response, and too much may reduce efficiency or cause irritation.

Low irradiance (<10 mW/cm2): often not strong enough to penetrate deeply or produce noticeable results.

Optimal range (10-50 mW/cm2): Clinically shown to stimulate ATP production, increase collagen, reduce inflammation, and kill acne bacteria.

Hight but safe levels (>50 mW/cm2): Can be effective if properly timed and used with safety measures.

Does LED therapy actually work?

Supporting Collagen Production

Red Light (630nm)

Red LED light is known for its ability to penetrate deeply into the skin, reaching the dermis layer where collagen production occurs. By stimulating fibroblasts (cells responsible for collagen synthesis), red light can help improve skin elasticity, reduce fine lines, and give skin a firmer, more youthful appearance. 

This collagen-boosting effect makes red LED light a popular choice for those looking to address signs of ageing and rejuvenate their complexion.

Enhancing Radiance and Reducing Redness

Yellow Light (590nm)

Yellow LED light operates within a wavelength range that stimulates the skin’s mid-dermis and has a dual action enhancing blood circulation and promoting cell renewal. It’s known for its calming effects, helping to reduce redness and soothe sensitive skin. Yellow light therapy can also improve overall skin tone such as treating conditions like melasma while giving the complexion a natural, healthy glow.

This gentle approach makes yellow LED light an ideal option for individuals with sensitive or reactive skin.

A Targeted Approach to Acne

Blue Light (460nm)

Blue LED light is effective in addressing acne by reducing the activity of sebaceous (oil) glands and targeting acne-causing bacteria on the skin's surface. By controlling oil production and diminishing bacteria, blue light helps prevent the formation of new breakouts and promotes a clearer, healthier complexion. 

When combined with red light, it creates a powerful synergy, with blue light treating the source of acne and red light reducing inflammation and supporting skin healing.

"Blue and red ligh combo therapy led to a 76% reduction in acne lesions over 12 weeks." (Study Gold et al., J Clinc Aesthet Dermatol, 2009)

Supporting Deeper Skin Health and Wellness

Infrared Light (850nm)

Infrared LED light penetrates deeper than visible light, reaching the subcutaneous layers where it influences circulation, nutrient delivery, and cellular repair. This wavelength is particularly beneficial for reducing fine lines and improving skin elasticity, supporting overall skin wellness from the inside out.

Infrared light is also valued for its therapeutic effects, including pain relief and faster healing, making it a holistic addition to any skincare routine.

Terminology

  • Blue Light

    A visible wavelength that appears blue and targets the epidermis, often used to treat acne.

  • Dermis

    The middle layer of skin, where collagen and elastin are produced.

  • Epidermis

    The skin's outermost layer, the visible layer that protects against environmental factors.

  • Irradiance

    The intensity of light energy delivered to the skin; critical for determining LED therapy’s effectiveness.

  • LED

    Stands for Light Emitting Diode, a technology that produces specific wavelengths for therapeutic purposes.

  • Light Wavelengths​

    The distance between two peaks in a wave of light, measured in nanometres (nm); determines the depth of skin penetration.

  • Nanometres (nm)​

    A unit of measurement for light wavelengths; a billionth of a meter.

  • Near-Infrared Light

    A wavelength beyond visible light, reaching the subcutaneous layer for deeper skin benefits.

  • Red Light​

    A visible wavelength appearing red, known for stimulating collagen production.

  • Subcutaneous Layer​

    The innermost layer of skin, containing connective tissue and fat.

  • Ultraviolet (UV)​

    A type of electromagnetic radiation not visible to the human eye; associated with sun exposure and skin aging.

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