Letto Sleep - Blueblocker glasses

Lichtblock® Letto Sleep Blueblocker glasses

For restful sleep: the Lichtblock® Sleep series

The Sleep Series has been specially developed for the hours after sunset. It effectively filters out 100% of the blue light that prevents your body from switching to night-time sleep mode.

Protection until	500 nm
graph
Blocks	Blue light
UV 400 filter	Yes
Suitable for road traffic	No

Our lenses block 100% blue light

Glass	Transparent Blue light filter Lichtblock® Sleep 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 Sleep series

• Improves the quality of your sleep: By blocking disturbing blue light, the Sleep Series promotes a natural sleep cycle and helps you fall asleep faster and sleep more deeply.
• Relaxes your eyes: Long screen time puts strain on our eyes. The Sleep range reduces this strain and prevents eye strain and dryness.
• Effectively and without extra effort: Simply put them on and enjoy the immediate effect. No need to change your evening habits or do without technical devices.

The problem: blue light in the evening

• Do you spend a lot of time in bright surroundings in the evening?
• Are you often busy with screen work?
• Do you like to watch a movie or series in the evening?
• Do you have problems falling asleep or staying asleep?

Then the use of blue blockers may be useful for you.

The crucial and biggest problem with blue light after sunset is the effect it has on our nervous system. After dark, the light tricks 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