What is HEVIS light

What is high-energy visible light – And why do we need to protect skin from it?

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La lumière à haute énergie visible (ou lumière HEVIS) est omniprésente. Elle fait partie de la lumière visible. Elle est connue depuis aussi longtemps que les rayons UV ; beaucoup de recherches ont été faites sur son effet sur la peau. Cependant l’effet moléculaire et visible de la lumière HEVIS sur la peau est une découverte récente. De nombreuses études ont été menées sur les effets des rayons UV sur la peau. Des recherches ont prouvé que la lumière HEVIS a une influence sur l’état de la peau et peut provoquer son

photovieillissement (vieillissement prématuré en raison de l’exposition au soleil). Nous allons examiner dans cet article les effets de la lumière HEVIS sur la peau en comparaison avec les rayons UVA et UVB, ainsi que la meilleure façon de protéger votre peau du photovieillissement.


Qu’est-ce que la lumière à haute énergie visible (HEVIS) ?

50% des rayons du soleils sont visibles.

The sunlight spectrum consists of UV, visible and infrared light. Visible light accounts for 50% of the sunlight spectrum and, as the name suggests, it’s the only part of light that can be detected by the human eye (UV and Infrared Light are both invisible).


The blue/violet band of this visible spectrum has a particularly high energy level and is known as High Energy Visible Light. This is often abbreviated to HEV Light or HEVL.

The sunlight spectrum
La lumière HEVIS se situe dans la bande allant du violet au bleu du spectre visible.

Quelle est la différence entre la lumière HEVIS et les rayons UV ?

La lumière se mesure en longueur d’onde, dont l’unité est le nanomètre (nm) et le millimètre (mm). La lumière visible possède une longueur d’onde allant de 400 à 760 nm et la lumière HEVIS (ou lumière bleue) se situe vers 400 à 500 nm. Les UV possèdent une longueur d’onde plus courte (allant de 290 à 400 nm). Les UVA ont une longueur d’onde plus élevée que les UVB.

La grande majorité des dommages provoqués par le soleil est due aux UV.  L’objectif des produits solaires est de protéger votre peau des UV.

La lumière HEVIS et les rayons UV affectent la peau différemment

While UVB rays penetrate the outermost layers of skin (the epidermis), HEV Light, like UVA rays, penetrates into the lower layers of skin (the dermis):


  • UVB rays are responsible for sunburn. HEVIS Light has not been associated with sunburn.
  • UVB rays and, to a lesser extent, UVA rays have been linked to DNA damage which can cause skin cancer.
  • Both UVA rays and HEVIS Light can cause skin to age prematurely (photoage).
  • UVA rays are the primary cause of sun allergies. UVB rays can also cause sun allergies, but to a lesser extent.
  • UVA, UVB and HEVIS Light can induce hyperpigmentation and may contribute to conditions such as sun spots (also known as age spots), melasma and post-inflammatory hyperpigmentation.



Comment la lumière HEVIS affecte-t-elle la peau ?

La lumière HEVIS est bénéfique à petite dose

Sunlight can be good for us – it’s an important source of Vitamin D which is essential for healthy bones and it boosts our levels of serotonin, lifting our mood. But too much sun can damage skin. 

La lumière HEVIS et l’hyperpigmentation

sun damaged skin
Les UVA, les UVB et la lumière HEVIS favorisent l’apparition de taches brunes.

Alongside UVA and UVB, HEVIS Light can induce uneven skin pigmentation (often referred to as hyperpigmentation) and may contribute to conditions such as age spots (also known as sun spots), melasma and post-inflammatory hyperpigmentation.


La lumière HEVIS et le vieillissement prématuré de la peau

Like UVA rays, HEVIS Light generates free radicals (also known as ROS – Reactive Oxygen Species). These free radicals cause skin cells to produce enzymes that break down the collagen and elastin that give skin its plump, youthful appearance. This process is often called oxidative stress and it’s what causes skin to photoage (age prematurely as a result of sun exposure).Aging is, of course, an entirely natural process, but when skin ages prematurely it may start to sag and develop deep wrinkles before its time.

Eucerin Sun Range

Comment protéger la peau du stress oxydatif provoqué par la lumière HEVIS ?

It’s important to remember that the sun’s rays affect your skin even when the weather is cloudy and overcast. Sun care should not be restricted to those days when the sun is at its hottest, but should form part of your daily skincare routine.


Many modern sunscreens offer effective protection against UVA and UVB rays, but the chemicals and pigments used to filter UVA and UVB do not filter HEVISIS light. For this reason, we recommend that you look out for products that contain antioxidants that work against oxidative stress. When choosing appropriate suncare products, the priority is still to give your skin the very best protection against UVA and UVB rays, but choosing products that also combat the oxidative stress caused also by HEVIS Light will further help to prevent photoageing and reduce instances of  hyperpigmentation. Antioxidants Licochalcone A and Glycyrrhetinic Acid have been proven to work together to protect skin cells in the deeper epidermal layers from sun-induced damage. 


Eucerin Sun products offer comprehensive protection against sun-induced skin damage. The innovative Advanced Spectral Technology combines broadband and photostable UVA/UVB filters1 for outstanding UV protection with antioxidant Licochalcone A for high-energy visible (HEVIS) light defense. Most of the products also contain Glycyrrhetinic Acid for additional DNA protection.

If aging is your primary skin concern try Eucerin Sun Fluid Photoaging Control SPF 50 and Eucerin Sun Creme Tinted Photoaging Control SPF 50+ Fair or Medium for your face and Eucerin Sun Lotion Extra Light Photoaging Control SPF 50+ for your body. These products combine Advanced Spectral Technology with Licochalcone A, Glycyrrhetinic Acid and Hyaluronic Acid which visibly reduces signs of aging. The tinted products also contain color pigments that instantly unify the complexion.

If hyperpigmentation on your face is your primary skin concern try Eucerin Sun Fluid Pigment Control SPF 50+ In addition to Eucerin’s Advanced Spectral Technology it contains Glycyrrhetinic Acid (to support skin’s own DNA repair mechanism) and Thiamidol. 

While prevention is best, once you have pigment spots Thiamidol is clinically and dermatologically proven to reduce dark spots and prevent their re-appearance.

1 Meeting the highest standards for UVA and UVB protection as defined by Cosmetics Europe. The levels of UVA protection are higher than the EU requirement.

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