Letto Dark - Blueblocker glasses

Lichtblock® Letto Dark Blueblocker glasses

Maximum protection in any environment: The Lichtblock® Dark series

In today's technology-dominated world, you are exposed to more artificial light than ever before - often when you least need it.

The Dark series is your solution for maximum light reduction, specifically designed for those moments when you can't control the lighting around you. Perfect for use in brightly lit airports, lively hotel lobbies or late night office buildings, the Dark series offers unparalleled protection for your eyes and your sleep cycle.

Protection up to	550 nm
graph
Blocks	Blue light + parts of the green light spectrum
UV 400 filter	Yes
Suitable for road traffic	No

Our lenses block 100% blue and 70% green

Glass	Transparent Blue light filter Lichtblock® Dark Blueblocker
100% blue light filter performance	max. 30% 100%
Sleep (protection against melatonin suppression)
Stress reduction for the eye (protection of sensitive photoreceptors)

Advantages of the Dark series

• Maximum light reduction: Blocks 100% of blue light and 70% of the green light spectrum up to 550 nm to protect your sleep cycle and improve your sleep quality
• Ideal for extreme light conditions: Especially recommended if you are in environments where bright light is prevalent and you have little control over the lighting.
• Promotes sleep quality: Supports the natural production of melatonin by minimizing exposure to light-induced melatonin suppression.

The problem: Blue light in the evening

The crucial and biggest problem with blue light after sunset is the effect it has on our nervous system. After dark, the light fools your brain into thinking it's the wrong time of day. This interrupts your sleep cycle and can have a negative effect on your health, especially over a longer period of time. Blueblockers can help you to protect your sleep cycle and improve your sleep quality.

Difference between LEDs and fire

LED spectrum

Blue light is light with a wavelength of approx. 380 to 495 nanometers (nm). This is short-wave and very high-energy light. Modern displays, LEDs and energy-saving lamps have a disproportionately high proportion of blue light. This stimulates certain photoreceptor cells and can lead to a dysregulation of your sleep-wake rhythm. This can have a negative effect on your hormones and metabolism.

---

Fire (candlelight)

Before we were able to turn night into day with the invention of electricity, there were only natural light sources in the form of fire. The big and decisive difference to today's light sources is the distribution of the light spectrum. As can be seen in the graph, blue and green are hardly present in candlelight. Furthermore, fire has no flicker effect, which can stress your nervous system. Therefore, fire usually has a calming effect.

---

Glasses dimensions

Spectacle width: 136 mm

Lens height: 46 mm Lens width: 52 mm

Bar width: 18 mm

Temple length: 130 mm

Features