Free shipping (DE) - 30 days return policy

Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle
  • Load the image into the gallery viewer, Lichtblock Letto Bundle

Lichtblock Letto Bundle

Blueblocker Glasses
Normal price
139,00 €
Special price
139,00 €
Normal price
158,00 €
Sold out
Unit price
per
incl. VAT plus Shipping costs
  • Ultra light frames
  • Double anti-reflective & tempered lenses
  • The right glasses for every evening
Delivery time approx. 2 to 4 working days

Free shipping
with DHL within Germany

Order risk-free
30 days right of return

2x Lichtblock® Letto Blueblocker glasses (500 & 550)

Model
Protection until
500 nm 550 nm
Graph
Block
Blue light Blue light + parts of the green light spectrum
UV 400 filter
100% 100%
Colour fidelity
■■■■□ ■■□□□
Screen work
■■■■■ ■■■□□
Series / film experience
■■■■□ ■■□□□
Going out in the evening
■■■■■ ■■■□□
Sleep (protection from melatonin suppression)
■■■■□ ■■■■■
Stress reduction for the eye (protection of sensitive photoreceptors)
■■■■■ ■■■■■
Suitable for road traffic
no no

Our lenses block 100% blue light

Glass

Transparent
Blue light filter

Lichtblock®
Blueblocker
100% blue light filter performance

max. 30%

100%
Sleep (protection from melatonin suppression)
Stress reduction for the eye (protection of sensitive photoreceptors)
  • 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 its effect 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 long period of time. Yellow or orange lenses that block 100% blue light can help you 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 nanometres (nm). It is short-wave and very energy-rich light. Modern displays, LEDs and energy-saving lamps have a disproportionately high share 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. (1)


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
Tip - Reduce the light intensity in your surroundings in the evening and create a relaxed atmosphere with alternative light sources such as our Lichtblock® Uno and candlelight.

A systematic review by Hester et al. (2) comes to the following conclusion:

Out of the 24 publications focusing on sleep, there was substantial evidence for blue-blocking glasses being a successful intervention for reducing sleep onset latency in patients with sleep disorders, jet lag, or variable shift work schedules. Given the well-established biological mechanism and clinical research showing that blue-blocking glasses are effective for inducing sleep, they are a viable intervention to recommend to patients with insomnia or a delayed sleep phase.
  • Our 500 models protect your eyes 100% from blue light and are very comfortable to wear, especially if you still want to see "colours" in the evening.
  • Our 550 models protect your eyes 100% from blue light and they still reach into the green spectrum. This can help to accelerate the formation of melatonin.
  1. ncbi.nlm.nih.gov/pmc/articles/PMC4763136/
  2. pubmed.ncbi.nlm.nih.gov/34030534/
Manufacturer Lichtblock GmbH
Model LB-LETTO
Glass variants Light orange (500), dark orange (550)
Scope of delivery 2x Blueblocker glasses (500 & 550), 2x glasses case, 2x 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

Properties

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 support@lichtblock.shop.

Customer Reviews

Based on 44 reviews
100%
(44)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
P
Patrik
Fall asleep faster, sleep better through the night

After ordering the glasses, they arrived at my home just 2 days later.
Wear them every evening for 2 hours before going to bed and feel DEEPLY that my body comes to rest, my eyes turn off and I become more tired.
The first evening was of course a bit unusual, due to the fact that everything is perceived more orange. From the 2nd evening, however, this was no longer a problem. Even when watching movies, I do not feel any impairment by the colored lens, only light blue colors are perceived slightly differently.

Fall asleep much faster and better through the glasses

M
M.
I am really excited!

I sleep much better and have more energy during the day!

S
Sven
Super glasses!

I the glasses came very quickly after ordering and are qualitatively very well processed. The effect after a few days is also exactly as already described by others here. I am satisfied all around!

D
David
Very great glasses

I previously had glasses from a cheap supplier. When I decided to order one from Lichtblock and tested it, I was really overwhelmed. I have a lot of LED lights at work and used the glasses a lot. It's actually amazing, but the blue light is filtered out very well. Blue LEDs or even an ambulance with blue lights, all of this seems like it's swallowed up with the glasses. Really cool I must say.

A
Andrea King
Super glasses

Am very satisfied