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A man jogging in the park during daylight hours

Awake. Clear. In Sync. How the Right Light Gets Us Back on Track

Ein neuer Tag beginnt. Der Bildschirm leuchtet, der Kalender ist voll, die To-do-Liste wartet. Alles scheint bereit für Konzentration, Fokus, Leistung. Und doch fehlt oft etwas Entscheidendes: der Impuls, der uns innerlich auf Tagesmodus stellt. Mit unserem neuen BluCynk® Filter kommt dieser Impuls klarer an als je zuvor.

Bright is not Enough

The Light we Lack

We live in a world full of light sources – and yet we often don’t get the light our bodies really need. Modern work and living spaces are equipped with LED lights, screens, and displays. What looks bright is often biologically inadequate: the spectral composition of these light sources differs significantly from natural daylight. Above all, one thing is missing: the balanced combination of activating and regenerating light.

The result: despite constant exposure to light, many people experience symptoms such as fatigue, problems concentrating, poor sleep, or low mood. The cause is often not a lack of light, but rather a lack of effective light.

This is because light not only affects our vision, but also our internal clock. And because the composition of daylight changes throughout the day, the body has developed a sophisticated mechanism for recognizing the start of the day: specialized cells in the retina are particularly sensitive to a narrow range in the blue light spectrum—around 480 nanometers.

When this component is strongly represented in light, as is the case in the morning, these cells recognize that it is daytime. They send appropriate signals to the brain, which prepare our organism for activity, concentration, and alertness. However, this only works when we are exposed to natural light.

A woman looks at the bright sky through BluCynk glasses.
The ideal time to soak up plenty of daylight is in the morning and early afternoon.
This is how BluCynk modulates the light spectrum

A Filter that Understands Nature

The solution: BluCynk®

Instead of living in tune with the natural rhythm of light and darkness, we spend most of our days under artificial light sources—often bright, but biologically poor. This is exactly where BluCynk comes in: the filter was developed to send clear signals to the body despite limited daylight availability—exactly when it matters most.

BluCynk does not change the brightness, but rather the quality of the light. The filter specifically emphasizes the activating blue component around 480 nm by allowing this spectrum to pass through preferentially. The result: a light that reminds our internal clock that it is daytime—even when the sun isn’t shining brightly or the surroundings don’t allow much natural light in.

In addition, BluCynk consistently filters out aggressive short-wave blue light—precisely the wavelengths that strain our eyes and can promote the formation of free radicals. And at the other end of the spectrum? There, BluCynk ensures that a particularly large amount of regenerative red and near-infrared light is transmitted—a balance that our artificial light environment urgently needs.

This is how light becomes a targeted stimulus. And a filter becomes a tool that helps us stay in our own rhythm—clear, alert, and in tune with the day.

How to Use the Daylight Hack in Everyday Life

You may not always have time for a long walk in the morning. But targeted light can often be effective even in small doses—provided they are biologically active. This is exactly where BluCynk comes in: Whether as a filter attachment or a FitOver model, it enhances the natural 480 nm signal that your body’s clock looks to in the light that surrounds you.

It’s best to use BluCynk in the morning through early afternoon—ideally in natural daylight or with a window open. Just ten to twenty minutes of targeted light exposure can be enough to noticeably enhance your sense of natural daylight. BluCynk can also be easily incorporated into your routine during your lunch break, while working from home, while reading, or on your way to work.

This allows you to make the most of the available light and give your day exactly the boost your body needs.

Studies at a Glance

Numerous studies have shown that the composition of light has a measurable impact on our circadian rhythm, our performance, and our cellular health. BluCynk® uses this knowledge to specifically modulate the available light.

Concentration in the Right Light

This systematic review study examined the relationship between light and cognitive performance. Short-wave, bright light sources in the morning—i.e., blue-dominant daylight—had a particularly significant effect: they increased alertness, shortened reaction times, and promoted mental alertness.

Blue Light: Between Rhythm and Risk

Blue light plays a central role in the circadian rhythm and is used specifically to treat sleep disorders. At the same time, research shows that excessive exposure—especially from LED sources—can damage the eye. This study emphasizes the need to distinguish between beneficial and harmful blue light.

Regeneration Through Near-infrared Light

This review shows how targeted use of red and near-infrared light (600–1000 nm) can trigger biological processes, particularly in nerve cells. Photobiomodulation boosts cellular energy, reduces oxidative stress, and supports healing and regeneration processes.

Even on cloudy days, it is brighter outside than inside.

Daylight in Winter

Why Even Cloudy Days are Valuable

Especially during the darker months, many people think that we simply cannot get enough light. But that is only partly true. Although the sun is lower in the sky in winter and the days are shorter, the main problem is that we spend so much time indoors. This is because there is almost always more biologically effective light available outdoors than indoors.

Even when the sky is overcast, we often receive several times more light outdoors than we do from typical indoor lighting. And it’s not just brightness that matters: even in winter, daylight contains the activating blue component around 480 nm that our internal clock uses to recognize “daytime.”

This means:
You don’t necessarily need sunshine—you just need daylight.

Even brief periods spent outdoors can provide a noticeable light stimulus. And this is exactly where BluCynk comes in: The filter helps modulate the available light—whether bright or winter-gray—so that the light signals reach the body more clearly.

This allows you to get the most out of every moment of light, even during the dark winter months, and give your body the signal it needs to stay stable, alert, and balanced.

Understanding Light -

Using Light Strategically

You now know how much light affects our bodies—far beyond what we can see. You have learned that not all bright light wakes us up, that not all blue light has the same effect, and that natural morning light is a complex interplay of activating and regenerating components. Above all, you now know that this knowledge can be put to good use.

BluCynk isn’t a cure-all. But the filter is a precise tool—for anyone who gets little natural light during the day or wants to actively control their lighting conditions. It doesn’t replace anything fundamental, but it helps you use the available light more consciously and effectively.

Maybe the light outside is still the same as it was yesterday. But now you know how to use it differently. You have a tool at your disposal that can help your eyes remember that it’s daytime—and help you regain your balance.

Everyday life remains the same. But something has changed: you.

Image credits:

Title:
– Man Running in a Park by Aflo Images via Canva.com
In the article:
– Trees in Autumn by Zane Magone via Canva.com

and own image material (c) Innovative Eyewear

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