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Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses
Letto Sleep - Blueblocker glasses

Letto Sleep - Blueblocker glasses

Blueblocker Glasses
Normal price
79,00 €
Special price
79,00 €
Normal price
Sold out
Unit price
incl. VAT plus Shipping costs
  • Ultra light frame
  • Double anti-reflective & tempered lenses
  • 100% blue light protection
In stock - In 2 to 4 working days at your home

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with DHL within Germany

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Lichtblock® Letto Sleep Blueblocker glasses

For restful sleep: the Lichtblock® Sleep series

The Sleep series was 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
Blue light
UV 400 filter
Suitable for road traffic

Our lenses block 100% blue light


Blue light filter

Sleep Blueblocker
100% blue light filter performance

max. 30%

Sleep (protection from melatonin suppression)
Stress reduction for the eye (protection of sensitive photoreceptors)

Advantages of the Sleep series

  • Improves your sleep quality: By blocking disturbing blue light, the Sleep series promotes a natural sleep cycle and helps you to fall asleep faster and sleep more deeply.
  • Relax your eyes: Long periods of screen time strain our eyes. The Sleep range reduces this strain and prevents eye strain and dryness.
  • Effective and with no extra effort: simply put it on and enjoy the immediate effect. No need to change your habits in the evening 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 film or a series in the evening?
  • Do you have problems falling asleep or staying asleep?

Then the use of blueblockers may make sense 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

Lichtblock Blueblocker Graphic LED Spectrum Bluepeak

LED spectrum

We speak of blue light at 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 through the invention of electricity, there were only natural sources of light in the form of fire. The big and decisive difference to today's light sources is the distribution of the light spectrum. Blue and green are hardly present in candlelight, as can be seen in the graph. Furthermore, fire has no flicker effect, which can stress your nervous system. Therefore, fire usually has a calming effect.

Lichtblock Blueblocker Graphic Spectrum Fire Candlelight
With the Sleep series, you lay the foundation for a night of rest and relaxation. Whether you work late into the evening or just want to relax.
Manufacturer Lichtblock GmbH
Glass variant Sleep
Scope of delivery Blueblocker glasses, glasses case, glasses cleaning cloth

Spectacle dimensions

Spectacle width: 136 mm
Glass height: 46 mm Glass width: 52 mm
Bar width: 18 mm
Temple length: 130 mm


Frame colour Black
Spectacle shape Round
Frame type Full rim
Frame material Acetate
Weight 18 g
Accessories Spectacle case, spectacle cleaning cloth

Do you have any questions?

Maybe our FAQ page will help you. If not, please send us an e-mail to

Customer Reviews

Based on 69 reviews
Not so enthusiastic unfortunately

Well, the glasses block perfectly, BUT the lenses are clearly too orange (for me), I find that rather annoying...the colors are also no longer really recognizable on the screen, very irritating in my opinion.

Thank you for your feedback. We are sorry to hear that you are not completely satisfied with our glasses. The orange color of the lenses is necessary to block 100% of the blue light. This tint is specifically designed so that your melatonin production and sleep quality are not affected by the blue light from screens in the evening. However, we understand that everyone can react differently to our glasses. Perhaps our lighter Work+Play option would be a good alternative for you. This is our middle ground between blocking blue light and a natural viewing experience. It blocks 85% of blue light without changing color perception too much. Best regards and all the best, your Lichtblock team

Dirk Breder
Everything fine

I'm really impressed with the glasses. Very comfortable to wear.


I am very satisfied. The glasses are very comfortable to wear and very light.
They have become my regular evening routine and I feel very good since I have been wearing them regularly🙏

Gisela W.
Very good

I bought them for my husband: he says: very good. Helps you fall asleep and is pleasantly light.

A. Bontos
Super quality

The glasses are nice and light and fit very well, making them comfortable to wear. The intensity of the lenses is also very good. Definitely recommended