A man asleep next to a small red lamp on his nightstand

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The colour of your light decides how sleepy you stay.

Bright light at night tells your brain it is morning. Red light is the colour it reacts to least. Here is the research, with every source.

Stay in night mode

In 2002, scientists found a third light sensor in the human eye.

Not the cells you see with. A third kind of cell, with one job: telling your brain what time of day it is.1 It does that by reading the colour of the light that enters your eyes.

This cell reacts most to blue light, around 480nm. A Harvard team pinned the human body clock's peak response at 481 to 483nm in PNAS.8 When these cells see that light, they signal the master clock in your brain.

What does that signal do?

It tells your brain: it is daytime, stay alert, hold back melatonin. That is the blue light problem you have heard about. Most people do not know how far it reaches.

Cool white LED bulbs put up to 30 to 40 percent of their light into blue. Even warm white LEDs still carry 15 to 21 percent.4 Your bathroom light, your hallway light, the soft white bulb on your bedside table: they all send your brain the same signal.

Night mode on your phone? It cuts blue light by only 18 to 63 percent depending on the device.5 Better than nothing. You are still sending your eyes a daytime signal at close range.

Not all red light is the same red. Wavelength matters.

Visible light runs from about 380nm, violet, to 700nm, deep red. The daytime signal peaks around 480nm and drops sharply as the wavelength rises. By 600nm, orange-red, the response is minimal. At 670nm, deep red, it is about 1/50,000 of the peak.2

That means 670nm light can light a room, enough to read by, enough to change a nappy, enough to walk to the bathroom, without setting off the signal that suppresses melatonin. And the research suggests red light in the evening may do more than stay out of the way.

Why pink and sunset lamps are not red enough.

Because many of them are not pure red. A red-tinted bulb can still let through blue and green light. Pink and sunset lamps mix blue into their colour. Orange-red sits closer to the colours your body clock still reacts to. A true red light at 670nm gives only red.

Lampiero glowing deep red on a bedside table
670nm. The colour your body clock reacts to least.

In pictures

The science, in pictures

Not all red light is the same red.
Not all red light is the same red.Dotaknite se za povečavo
The other red light. Not a mask, not a panel.
The other red light. Not a mask, not a panel.Dotaknite se za povečavo
A salt lamp glows orange. Red is the colour your body clock reacts to least.
A salt lamp glows orange. Red is the colour your body clock reacts to least.Dotaknite se za povečavo
Half of adults use a screen in bed every night.
Half of adults use a screen in bed every night.Dotaknite se za povečavo

Harvard sleep lab

90minutes

Room light in the evening cut about 90 minutes off the body’s night.

Melatonin is the signal that tells your body it is night. In a Harvard sleep lab, people who sat in ordinary room light before bed started making it later. Their melatonin night was about 90 minutes shorter. Deep red at 670nm is the colour the body clock reacts to least.

Room light before beda shorter night

Dim light before bedthe full night

Gooley JJ et al., Harvard Medical School. Journal of Clinical Endocrinology and Metabolism, 2011.

Stay in night mode

The accelerator and the brake, at the same time

Melatonin is the hormone your body makes to signal sleep. It rises in the evening as the light fades, peaks in the middle of the night and falls towards morning.

Take a supplement and keep the blue-rich lights on, and you press the accelerator and the brake at the same time. The pill tries to raise melatonin. Your bathroom light tells your brain to suppress it. Your brain wins.

This is why supplements often work for a few weeks and then seem to stop. As Dr Andrew Huberman has noted, many melatonin supplements also contain far higher doses than the body makes on its own, and the real content varies widely between brands.

50%+

Room light during the usual hours of sleep suppressed melatonin by more than half in most trials.3

The more effective approach: remove the light that blocks your own melatonin in the first place.

What the research found

Every number on this page links to its source below.

China Institute of Sport Science, 2012

20 female athletes, 14 days. Half got 30 minutes of red light every evening. The red light group had significantly higher melatonin and better sleep quality scores, and their endurance improved too.6

Red vs blue light, 2025

12 adults, three hours of red or blue light in the evening. After two hours, melatonin under blue light stayed low, while under red light it came back to 3.5 times that level.7

Rensselaer Lighting Research Center, 2019

30 people. Red light through closed eyelids, at levels that do not suppress melatonin, reduced the groggy feeling on waking.10

Harvard Medical School, PNAS 2022

The body clock and melatonin suppression respond most to light around 481 to 483nm, deep in the blue.8

Communications Biology, 2023

Evening light with less blue in it shortened the time to fall asleep and reduced evening melatonin suppression.9

Dr Andrew Huberman, Stanford

He switches to red light in the evening and suggests red or amber light for waking up at night.11

A light can look warm and still wake you up.

A common question: my bedside table lamp is warm white, is that not the same thing? No, and this is where it gets confusing.

Warm white LEDs run at a colour temperature of 2700 to 3000K. They look warm. Measured, they still put 15 to 21 percent of their light into blue,4 the colour that daytime cell reacts to most. Candle-coloured LED bulbs still carry measurable blue. Salt lamps give off a broad spectrum that includes blue and green.

What should I look for in a night light?

Not how warm it looks, but which colours are in it. Most lights give off colours below 600nm, including many sold as sleep friendly. At 670nm, Lampiero sits well outside the range that moves your body clock.

Warm is not the same as red. Flip it.

Same bedroom, same night. Only the light changes.

Tap a light and watch the room

The same bedroom at night, osvetlitev: big light The same bedroom at night, osvetlitev: warm white The same bedroom at night, osvetlitev: red light

Big light

Bright enough for noon, in the middle of the night.

Warm white

Softer, and still white light. Up to 21% of it is blue.

Red light

Deep red at 670nm. Enough to see, and the room stays night.

Stay in night mode

For most of human history, the only light after dark was fire.

Campfires, hearths and candles give off most of their light in the orange and red. Our biology grew up under that glow. For 200,000 years it was the signal that said: it is safe to rest.

Then, in 1879, the light bulb changed everything. For the first time, bright white light was available after sunset. Modern life followed. Our biology did not update with it.

The military worked this out first. During the Second World War, submarine and carrier crews switched to red light after dark to keep their night vision. Red light became standard in aviation and astronomy, anywhere people need to see at night without losing their dark-adapted eyes.12

What was once military and aerospace knowledge now fits on your bedside table.

Why your body knows when to sleep: sunrise, sunset and red light

We read all 200+ verified reviews. Here is what stands out.

A word that keeps coming back is calming. People describe a red light that is gentle on the eyes.

Parents use it for night feeds: enough light to see clearly, gentle enough that the baby stays sleepy. People who get up for the bathroom notice the difference right away. They see where they are going and fall right back asleep.

The strongest reviews come from people who were sceptical. The recurring line is some version of: I was sceptical, and it works.

Real nights. Real people.

4,9
Več kot 200 preverjenih mnenj
5 ★219
4 ★12
3 ★0
2 ★0
1 ★0

Naročila iz 39 držav, od Belgije do Avstralije.

Zaspanje

Izvrstno

Bila sem zelo skeptična. Rdeča svetloba za spanje se mi je zdela ezoterika. Po dveh tednih moram priznati: veliko lažje zaspim.

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J
Julia S.
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Zaspanje

Spim veliko bolje

Pri nas so zelo temne zime in moj spanec je bil grozen. Ta svetilka je zelo pomagala pri večerni rutini. Hitreje zaspim in zjutraj se počutim bolj spočito. Vredno je.

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Sara M.
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Zaspanje

Živim v Bruslju in rdeča svetilka se mi ni zdela kaj prida. A po treh tednih vsakovečerne uporabe hitreje zaspim in ne jemljem več melatonina.

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L
Lies E.
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Zaspanje

Bila sem skeptična, kot zna biti le Belgijka. Rdeča svetilka za spanje, no ja. In glej: res deluje.

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C
Charlotte V.
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Ponoči na stranišče

Ponoči grem v kopalnico, ne da bi prižgala kakršno koli luč. S to lučko skoraj takoj spet zaspim.

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Μ
Μαρία Π.
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Zaspanje

Odličen nakup

Na začetku nisem bila prepričana, ali res pomaga pri spanju. Toda po enem mesecu lahko rečem, da me veseli, da sem poskusila. Moje noči so bolj mirne.

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I
Inês P.
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Nočno hranjenje

Čudovito

Za nočno hranjenje genialna. Dojenček ostane zaspan in vsa družina spi bolje.

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S
Simon K.
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Zaspanje

Zdelo se mi je čudno, da bi kupila rdečo svetilko za spanje. Toda po enem mesecu vsakovečerne uporabe se je kakovost mojega spanca zelo izboljšala. Priporočam.

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Hannah R.
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Zaspanje

V tirolski zimi so večeri dolgi in temni. Ta svetilka naredi ure pred spanjem veliko prijetnejše.

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Bernhard P.
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Kot darilo

Zelo vesel

Zelo sem dvomila, da lahko rdeča luč pomaga pri spanju. A sestra mi jo je podarila in po nekaj tednih sem opazila resnično spremembo. Manj zbujanja ponoči.

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Isabel G.
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Zaspanje

Lepa topla svetloba, zaradi katere je spalnica zvečer zelo prijetna. Uporabljam jo eno uro pred spanjem in prehod v temo je bolj naraven.

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S
Simon D.
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Zaspanje

Spim bolje

Nehal sem jemati tablete melatonina po enem mesecu s to svetilko. Moje telo zdaj zmore samo. To je osvobajajoče.

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Kevin Q.
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Zaspanje

Kot razpoloženjska svetloba v spalnici je čudovito pomirjujoča. Rdeča svetloba ima nekaj iskonskega in pomirjujočega.

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D
Dieter F.
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Zaspanje

Presenečen

Zvečer sem ugasnila vse bele luči. Po osmi uri samo rdeča svetloba. Moj spanec se je popolnoma spremenil.

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Eline N.
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Ob partnerju ali partnerki

Deset let težav s spanjem. Zdravniki, tablete, terapija. In potem pomaga majhna rdeča svetilka. Težko je verjeti.

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A
Anja R.
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Ponoči na stranišče

Uporabljam jo zvečer za uspavanje in ponoči za obisk stranišča. Dve muhi na en mah.

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M
Martin B.
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Kot darilo

Presenetljivo dobro

Odkar sem razumela, da je bela svetloba zvečer strup za spanje, uporabljam samo rdečo svetlobo. Ta svetilka je za to popolna.

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Sandra V.
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Ob partnerju ali partnerki

Svetilka v spalnici ustvari nekakšno vzdušje ob taborniškem ognju. Zelo pomirjujoče. Res se čuti, kako se telo umiri.

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Sabine R.
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Zaspanje

Vse spremeni

To je bil moj zadnji poskus, preden bi se spet vrnil k zdravniku po uspavalne tablete. Če bi vedel, da je težava luč, bi to naročil že pred desetimi leti.

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Maxime M.
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Ob partnerju ali partnerki

Zaenkrat v redu

Žena jo uporablja vsak večer pred spanjem. Pravi, da hitreje zaspi. Mislim, da je morda placebo, ampak je zadovoljna, zato sem zadovoljen tudi jaz.

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Gianluca G.
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Brez telefona

Najboljša

Odvisnost od telefona pred spanjem je bila resna težava. Ta svetilka mi je dala razlog, da ga odložim. Prižgem rdečo luč in telefon gre v predal.

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C
Carlo T.
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Nočno hranjenje

Končno spim

Dojim lahko, ne da bi prižgala stropno luč. Punčka po tem takoj spet zaspi, jaz tudi. Prej je bila vsakič drama.

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Elisa Q.
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Zaspanje

Vse spremeni

Najprej naj povem, da sem pri takih stvareh zelo skeptična. Naročila sem jo samo za nočno lučko za otroka. Presenečenje: tudi moj spanec se je izboljšal.

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Alessia N.
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Zbujanje ponoči

Uporabljam jo, ko se zgodaj zjutraj zbudim s tesnobo. Prižgem jo na rahlo, rdeča svetloba me pomiri in znova zaspim. Prej sem ostala v temi in strmela v strop.

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A
Anna C.
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Zaspanje

Delam v nočnih izmenah v bolnišnici. Ko se vrnem domov ob šestih zjutraj, prižgem samo to in zaspim v pol ure. Prej sem potreboval dve uri.

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Davide Z.
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Zaspanje

Malo draga

Prebrala sem o tej valovni dolžini 670nm in melatoninu. Naročila sem jo iz znanstvene radovednosti. Moram reči, da spim bolje, a ne vem, ali je to placebo ali resnično.

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Silvia L.
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Zaspanje

Dobra

Trpim za nespečnostjo, odkar sem vstopila v menopavzo. Poskusila sem prehranska dopolnila, čaje, vse. Ta svetilka ne reši vsega, a noči so manj težke.

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Valentina S.
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Zbujanje ponoči

Vredno je

Po tretjem otroku nisem spala več kot štiri ure. Poskusila sem vse. Ta svetilka ni magija, a nekaj se je spremenilo v kakovosti spanca. Zjutraj sem manj izčrpana.

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Elena V.
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Zaspanje

Drugačna pričakovanja

Lepa, a malo svetlejša, kot sem pričakovala. Tudi na najnižji stopnji se mi zdi premočna za spanje ob njej. Uporabljam jo pol ure prej in jo nato ugasnem s časovnikom.

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Chiara B.
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Zaspanje

Priporočam

Hitreje zaspim.

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Ε
Ελένη Κ.
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Ponoči na stranišče

Spim bolje, odkar ne uporabljam več luči na stranišču.

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Y
Yannick D.
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Zaspanje

Hvala

Lahko potrdim, da ta svetilka izboljša kakovost mojega spanca.

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C
Céline L.
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Zaspanje

Spimo bolje in naši večeri so lepši.

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A
Adrián D.
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Nočno hranjenje

Nosim jo iz spalnice v otroško sobo in nazaj. Brez kablov, brez vtiča. Za mlade starše je to nepogrešljivo. Škoda, da tega nismo poznali prej.

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K
Katrin R.
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Ponoči na stranišče

Odlično

Za obisk stranišča ponoči je popolna. Vzamem jo s sabo, opravim, kar moram, in v nekaj minutah spet zaspim. Prej mi je močna luč uničevala spanec.

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T
Thorsten S.
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Ob partnerju ali partnerki

Žena spi, medtem ko jaz še berem. Rdeča svetloba je sploh ne moti. S staro svetilko na nočni omarici je bilo to nemogoče.

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S
Stefan H.
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Nočno hranjenje

Dojenčica ostane zelo mirna ob tej luči med nočnim hranjenjem. Prej je vedno jokala, ko je zagorela velika luč. Zdaj je veliko bolje.

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Rick B.
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Kot darilo

Moja mama, ki ponoči vstane trikrat, jo je dobila od mene. Pravi, da je najboljše darilo, ki ga je kdaj dobila. Zdaj hočem še jaz eno.

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C
Claudia T.
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Ob partnerju ali partnerki

Mož se je norčeval iz moje rdeče svetilke. Čez dva tedna me je prosil, naj naročim še eno za njegovo stran postelje.

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Delphine F.
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Otroci

Moj dveletnik jo obožuje. Imenuje jo luč za lahko noč. Bolj mirno zaspi in lahko pogledam k njemu, ne da bi se zbudil.

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B
Beatrice B.
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Nočno hranjenje

Zelo dobra kakovost

Ravno prav za previjanje ponoči. Dovolj svetlobe, da se vse vidi, a ne tako svetla, da bi se dojenček povsem zbudil.

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D
Daniel G.
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Brez telefona

Ob devetih dam telefon v kuhinjo in prižgem to svetilko. Zdaj spet berem knjige kot nekoč. Najboljša odločitev za moj spanec in možgane.

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Ralf H.
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Kakovost

Naredi, kar obljublja

Lepa svetilka, ki se prilega moji spalnici, ne da bi bila videti čudno. Rdeča svetloba je prijetna, ne kot tiste poceni, ki so preveč rožnate.

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S
Stefanie F.
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Kakovost

V primerjavi z rdečimi žarnicami s spleta: tiste so kričeče rožnate, ta je resnično rdeča in toplejša. Ogromna razlika.

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N
Nicola L.
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Kakovost

Baterija zdrži dolgo. Polnim jo enkrat na teden in jo vsak večer uporabljam približno eno uro. USB-C je priročen.

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F
Federica E.
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Nočno hranjenje

Popolna za nočno hranjenje. Dojenček se ne zbudi povsem, jaz tudi ne. Prej, ko je gorela velika luč, so bili vsi povsem budni.

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J
Jeroen D.
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Ponoči na stranišče

Po obisku stranišča zdaj znova zaspim v petih minutah. Prej je sledila ura premetavanja v postelji. Razlika je ogromna.

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A
Anne M.
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Nočno hranjenje

Pri dvojčkih so nočne stekleničke vsaki dve uri. Ta svetilka rešuje naše noči. Dnevna soba ostane temna, dojenčka ostaneta mirna.

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Virginie P.
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Nočno hranjenje

Prvi tedni z dojenčkom so čisto preživetje. Ta svetilka mi je omogočila nočna hranjenja iz stekleničke, ne da bi spalnica postala operacijska dvorana.

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M
Mathieu A.
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Zbujanje ponoči

Stalno stoji na moji nočni omarici. Ko se sredi noči zbudim, jo prižgem in ne posežem po telefonu. Navade je konec.

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M
Massimo S.
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Nočno hranjenje

Končno mir

Pri drugem otroku je bila svetilka z nami od prvega dne. Če bi jo imeli pri prvem, bi bilo marsikaj lažje.

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J
Jan H.
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Ponoči na stranišče

Ponoči grem na stranišče morda dvakrat. Prej me je močna luč popolnoma zbudila. Zdaj s to svetilko zelo hitro spet zaspim. Sprememba življenja zame.

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M
Margaux V.
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Ponoči na stranišče

Vsak večer

Prenosna do stranišča in nazaj. Nič več luči na hodniku. V dveh minutah spet spim.

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R
Ruben Q.
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Kakovost

Spim bolje

Vzamem jo na vsako potovanje. V hotelu deluje enako dobro. Moj ritem spanja ostane enak, kjer koli sem.

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N
Nienke A.
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Kot darilo

Popolno

Namenjena je moji 72-letni mami, ki ponoči vstaja. Vidi, kam stopa, ne da bi prižgala stropno luč.

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Hélène D.
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The protocol, in five steps

  • Start 1 to 2 hours before sleep

    Turn on your red light and switch off every other light in the room. This gives your body time to make melatonin without interference.

  • Make it your only light

    The benefit disappears if the ceiling light stays on or you keep using bright screens. If you need your phone, keep it short and at minimum brightness.

  • Use the timer

    30, 60 or 90 minutes. Let it switch itself off after you fall asleep. You need red light for the hour before sleep, not all night.

  • Use it when you wake up at night

    Bathroom, a feed, checking on a child. Use Lampiero instead of the ceiling light. For people who fall asleep fine but struggle to fall back asleep, this is the change that matters most.

  • Give it time

    Some people notice it the first night. For others it takes 1 to 2 weeks while the body clock adjusts.

Where do you need light at night?

Start with your bedside. Every extra lamp costs less than the one before.

Skoraj 1 od 2 kupcev naroči dve svetilki ali več

30 noči za preizkus Brezplačna dostava po vsem svetu Prispe v 8 do 13 dneh

Stay in night mode

4,9Več kot 200 preverjenih mnenj

Preberite, kaj se je spremenilo v njihovih nočeh

Preverjen nakup

Izvrstno

Bila sem zelo skeptična. Rdeča svetloba za spanje se mi je zdela ezoterika. Po dveh tednih moram priznati: veliko lažje zaspim.

Prevedeno iz nemščine

Julia S.

Preverjen nakup

Nosim jo iz spalnice v otroško sobo in nazaj. Brez kablov, brez vtiča. Za mlade starše je to nepogrešljivo. Škoda, da tega nismo poznali prej.

Prevedeno iz angleščine

Katrin R.

Preverjen nakup

Mož se je norčeval iz moje rdeče svetilke. Čez dva tedna me je prosil, naj naročim še eno za njegovo stran postelje.

Prevedeno iz francoščine

Delphine F.

Več kot 200 preverjenih mnenj: preberite jih vse

Heard on a podcast

Andrew Huberman on The Diary Of A CEO

The Stanford neuroscientist on light at night: bright light and screens late in the day work against your melatonin. His advice is to dim the lights before bed.

Listen on Spotify ↗Chapter "How to offset night shifts and screen time", 20:53. Summary in our words, not a quote.

Every source on this page

Viri: 13 študij in smernic, na katerih temeljijo številke
  1. Berson DM et al., Science, 2002. Hattar S et al., Science, 2002.
  2. Lucas RJ et al., Trends in Neurosciences, 2014. Melanopični akcijski spekter CIE S 026:2018 (670nm je približno 1/50.000 vrha).
  3. Gooley JJ et al., Journal of Clinical Endocrinology and Metabolism, 2011.
  4. U.S. Department of Energy, Blue light characteristics of lighting sources, 2017 (457 belih LED izdelkov).
  5. Charoenpipatsin N et al., Clinical, Cosmetic and Investigational Dermatology, 2025. Nagare R et al., Lighting Research and Technology, 2019.
  6. Zhao J et al., Journal of Athletic Training, 2012.
  7. Sanchez-Cano A et al., Life, 2025.
  8. St Hilaire MA et al. (Harvard Medical School, Brigham and Women's Hospital), PNAS, 2022.
  9. Schöllhorn I et al., Communications Biology (Nature Portfolio), 2023.
  10. Figueiro MG et al. (Rensselaer Lighting Research Center), Nature and Science of Sleep, 2019.
  11. Huberman Lab, Using Light for Health, e-novice, 2023.
  12. Federal Aviation Administration, Airplane Flying Handbook, poglavje 11, Night Operations. U.S. National Park Service, smernice za opazovanje zvezd.
  13. NHS, Helping your baby to sleep (v angleščini), 2025.

Lampiero is a bedside lamp, not a medical device. The studies describe research on red light and light at night in general, not tests of this lamp. If you have a sleep disorder, talk to your doctor.

Common questions

What is blue light and why does it affect my sleep?

In 2002, scientists confirmed that part of the eye is built to tell the brain what time of day it is. It is most sensitive to blue light, around 480nm.12 Bright white light, phone screens and even many warm bulbs send that daytime signal. Deep red at 670nm is the colour the body clock reacts to least.

Why red, and not warm white?

Warm white is softer, but still carries 15 to 21 percent blue light.4 Warm light is better than harsh white. It is still not the same thing. Lampiero has a warm white mode for when you need more light, and deep red for the night.

Why not a red bulb or my phone's night mode?

A red-tinted bulb may look red but still emits blue and green wavelengths, and it stays in the ceiling. Night mode cuts blue light by only 18 to 63 percent depending on the phone,5 and you are still holding a bright screen.

Can I use it instead of melatonin?

You can start with the light before you reach for a supplement. Lampiero works on the light that tells your brain it is still day. Your body makes its own melatonin in the dark. Lampiero keeps the evening dark enough for that, while you can still see. If you take medication, talk to your doctor before you stop.

Is it safe for babies and children?

Yes. 670nm red light is gentle, non-UV, and produces no heat. Parents use Lampiero for night feeds, nappy changes and bedtime routines. It is the colour the body clock reacts to least.

How do I get the best results?

Turn Lampiero on 1 to 2 hours before you want to sleep and make it the only light in the room. Read, talk or listen to something in the red glow. Set the timer so it switches itself off. Give it a few evenings to become a habit.

When will I notice a difference?

You see the difference in the room the first night: the big light stays off and the others stay asleep. Give it a few evenings to become a habit.

What if it does nothing for me?

Use it for 30 nights. If it does nothing for your nights, send it back for a full refund. No hassle.

Still a question? Write to us and a real person replies within 24 hours. Contact us

Fall asleep sooner

Oglejte si vse slike in vseh 200+ mnenj →

4,9Več kot 200 preverjenih mnenj

One lamp. One hour before bed.

The wavelength from the research, on your bedside table. 30 nights to try it at home.

Stay sleepy tonight

30 noči za preizkus Ves denar nazaj, brez zapletov Brezplačna dostava po vsem svetu