The blue light from your phone isn't ruining your sleep

For a decadedekada, we've been told our screens are wreckingniszcząc our sleep. The real culpritwinowajca is far bigger thanznacznie większy niż the glowblask from your phone.

For years on end, we’ve been led to believe that our screens are wreaking havoc with our sleep. But the true cause runs far deeper than the mere glow coming from your phone.

For about ten years, people have said that screens ruin our sleep. But the real problem is bigger than just the light from your phone.

For the past few weeks, I’ve been fastening on a pair of special orange safety goggles about three hours before I go to bed. They’re made of thick, stiff plastic that bathes everything in a muted amber hue, so it’s difficult to make out anything blue. Still, I don’t stop there. I hang blackout curtains over the windows and turn off my lamps one at a time. Instead, I light my apartment exclusively with candles. My sleep routine may look completely unhinged, but it’s all part of an experiment. I wanted to find out what happens when you banish blue light.

I have spent the last few weeks strapping onzakładając na siebie a pair of special orange safety gogglesgogle three hours before bed. They're made of thick, uncomfortable plastic that casts the world in a dull amberbursztynowy glow, making it hard to see anything blue. But I don't stop there. I cover the windows with blackoutzaciemniający curtains and switch offwyłączać all my lamps, one by onejeden po drugim. In their placew ich miejsce, I exclusivelywyłącznie light my apartment with candles. My sleep routinerutyna, stały plan dnia is derangedszalony, kompletnie poplątany, but it's for an experiment. I found out what happens when you banishprzepędzić, całkowicie wyeliminować blue light.

For the last few weeks, I wear special orange safety goggles about three hours before bed. They are made of thick, hard plastic. They make the room look dull and warm, so it’s hard to see blue. But I don’t just do that. I put blackout curtains on the windows and turn off my lamps, one by one. Then I light my home only with candles. My sleep routine sounds strange, but it is for a test. I wanted to see what happens when there is no blue light.

Over the last decade, the world has become increasingly alarmed about this “photochromatic” menace. We’re told that our phones, televisions, computers, tablets, and even LED light bulbs subject us to an unnecessarily large dose of blue light. The claim is that this interferes with sleep by disrupting the natural daylight rhythms that help regulate our internal body clock. While some of this is supported by science, more recent research and analysis indicate that the situation is far more nuanced. Indeed, it’s quite possible that you’ve bought into a number of significant misconceptions. Experts tell me that it’s unlikely that the light from your phone is what’s derailing your sleep.

In the last 10 years, many people have become very worried about this “blue light” problem. They say that phones, TV, computers, tablets, and LED lights give us too much blue light. They say this can make it harder to sleep because it changes our body clock. Some studies support parts of this, but new research shows it may be more complicated. You may have some wrong ideas about this. Experts say it is probably not the light from your phone that is ruining your sleep.

The world has grown increasingly panicked about this photochromaticfotochromatyczny fiend over the past 10 years. We're told that our phones, TVs, computers, tablets and LED light bulbs expose us to a perverseszkodliwy, niewłaściwy amount of blue light. Supposedly, this ruins our sleep by disruptingzakłócając the natural rhythmsrytmy of daylight that influence our internal body clockwewnętrzny zegar biologiczny. There's science to back some of this uppotwierdzać część tych twierdzeń, but recent studies and analysisanaliza suggests that things are a lot more complicated. In fact, chances are good that you've fallen fordać się nabrać na some serious misconceptionsbłędne przekonania on this subject. Experts tell me it's unlikely that light from your phone is ruining your sleep.

Research findings are anything but clear-cut. For instance, the built-in settings that are meant to reduce blue light on your phone at bedtime may offer little, if any, real benefit for improving sleep. That said, the overall lighting that comes with modern life can still have a significant impact on how well you rest. So what would it really take to make a meaningful change?

The research is not the same for everyone. For example, the blue light filter on your phone at night may not help you sleep much. But the light around us today can affect your sleep a lot. What would it take to change this?

The research is mixedmieszany; niejednoznaczny. Those features designed to dial downzmniejszyć, przygasić blue light on your phone at bedtimepora snu, for example, are probably doing very little to improve your sleep. But the lightingoświetlenie of modern life really can have a huge effect on your sleep. What would it take to make a change?

I was determined to get to the bottom of it. So I reached out to the experts and plunged into the research.

I wanted the truth. So I called experts and studied the science.

I wanted the truthprawda. So, I called the expertseksperci and dove intozagłębiłem się w the sciencenauka.

To find out whether I could actually tell the difference, I threw myself into the most rigorously blue-light-free evenings I could manage. What I came away with was straightforward, actionable guidance that you can put to use—no awkward, tinted spectacles required. It may well be the key to a better night’s sleep.

To see if it would help, I tried the strictest blue-light-free nights I could. I found tips you can use—no silly tinted glasses needed. This could help you sleep better.

And to see if I could spot the differencedostrzec różnicę, I've plunged myself intozanurzyłem się w coś, całkowicie się w coś wciągnąłem the most extreme, blue-free eveningswieczory bez niebieskiego światła I could musterzebrać, zdołać zgromadzić. I landed onnatrafiłem na, w końcu wybrałem practical advice that you can use – no dorkyobciachowy, niemodny tintedprzyciemniony, zabarwiony gogglesgogle, okulary ochronne required. It could be the secret to a good night's sleep.

The public freakout about blue light started with a study in 2014. Half of the 12 participantsuczestnicy read on an iPad before bed. The rest read physical books. The iPad users took longer to fall asleep, felt groggierbardziej otępiali / bardziej zaspani the next day and produced less melatoninmelatonina. The researchers said the culpritwinowajca / główna przyczyna was the glow emittedemitowany / wydzielany from the iPad's LED screen, which produces a disproportionatenieproporcjonalny amount of light in the upper, bluer end of the spectrumwidmo. Under specific circumstancesw określonych okolicznościach, blue-enriched lightświatło wzbogacone w niebieską składową disrupts the daily circadian rhythmrytm dobowy – our body's natural pacemakerrozrusznik; regulator rytmu – that uses daylight to help determine when we start to feel tiredzaczynać czuć się zmęczonym. Subsequentnastępny; późniejszy research seemed to support the findingsustalenia / wyniki badań. Sounds simple, right? It's not.

People started to worry a lot about blue light after a study in 2014. Twelve people took part. Half of them read on an iPad before sleep, and the other half read paper books. The iPad group fell asleep more slowly, felt more tired the next day, and made less melatonin. The researchers said the iPad screen light was the problem. The LED screen gives off more of the blue light at the high end of the spectrum. In some cases, more blue light can mess with the body’s sleep clock, which uses daylight to help you know when it is time to feel sleepy. Later studies seemed to agree. It sounds easy, but it is not.

The widespread public panic about blue light traces back to a study conducted in 2014. Of the 12 participants, six read on an iPad in the hour before bed, while the others read printed books. Compared with the book readers, the iPad group took longer to fall asleep, woke up feeling more sluggish the next day, and produced less melatonin. The researchers blamed the LED screen’s glow, arguing that it overemphasizes the shorter-wavelength, bluer portion of the light spectrum. In certain situations, light that is enriched with blue wavelengths can throw off the body’s daily circadian rhythm—our internal, timekeeping “pacemaker”—which relies on daylight cues to signal when we should begin to feel tired. Follow-up studies appeared to back up these conclusions. It all sounds straightforward, doesn’t it? Unfortunately, it’s not.

"This was an incredibly deceptivezwodniczy, wprowadzający w błąd piece of worktekst / opracowanie / dzieło," says Jamie Zeitzer, a professorprofesor of psychiatrypsychiatria and behaviouralbehawioralny, dotyczący zachowania sciences at Stanford University, who studies the effect of light on the circadiandobowy system. The sciencenauka wasn't bad, he says, the problem is it brought people to bad conclusions.

“This study was very misleading,” says Jamie Zeitzer. He is a professor at Stanford University who studies how light affects our body clock. He says the science was not wrong, but it made people reach the wrong conclusions.

“This was an exceptionally misleading piece of work,” says Jamie Zeitzer, a professor of psychiatry and behavioural sciences at Stanford University, whose research focuses on how light affects the circadian system. He argues that the science itself wasn’t inherently flawed; rather, it led people to draw poor conclusions.

It's true that our screens are bluer. Modern screens and lightbulbs use LEDsdiody LED, which cannot producewytwarzać pure white light. Instead, they use blue LEDsdiody LED and cover some of them with a chemical called yellow phosphorfosfor, luminofor. The blue and yellow mix togethermieszać się ze sobą and trick your brain into seeingsprawić, że mózg widzi coś błędnie white, but extra blue always leaks outwydostaje się. 

It’s true that our screens lean more toward blue. Most modern screens and lightbulbs rely on LEDs, which can’t generate true, pure white light. Rather than producing white directly, they use blue LEDs and coat some of them with a chemical known as yellow phosphor. When the blue and yellow light combine, they fool your brain into perceiving white—yet a surplus of blue always escapes.

Yes, screens look more blue. New screens and lightbulbs use LEDs. LEDs cannot make pure white light. They use blue LEDs and add a yellow chemical called yellow phosphor. The blue and yellow mix, and your brain thinks it is white. But some extra blue still comes through.

And blue light really can influencewpływać na your sleep. Zeitzer says that's mostly because you have a light-sensitivewrażliwy na światło proteinbiałko in your eyes called melanopsinmelanopsyna which plays a key role in your sleep systemukład snu. "And melanopsinmelanopsyna is a blue sensitive proteinbiałko, which basically means that it is most sensitive to blue light," he says. Melanopsinmelanopsyna reactsreaguje to other colourskolory of light too, the effectefekt; wpływ of blue is just a bit strongersilniejszy. 

Blue light can really affect your sleep. Zeitzer says this is mostly because you have a special protein in your eyes called melanopsin. It helps control your sleep. Melanopsin is most sensitive to blue light, so it reacts more to blue. It also reacts to other colors, but blue works a little stronger.

Blue light can indeed affect your sleep. Zeitzer explains that this is largely because your eyes contain a light-sensitive protein called melanopsin, which is central to the sleep pathway. “Melanopsin is essentially a blue-sensitive protein, meaning it responds most strongly to blue light,” he says. Although melanopsin also reacts to other wavelengths of light, the impact of blue is simply a bit more pronounced.

“But the light our screens emit is, in practical terms, negligible,” says Zeitzer. He adds that real life doesn’t resemble the setup used in many blue-light studies. “In the lab, we keep someone in a very dim environment for most of the day, and then we hit them with a strong burst of bright light,” he explains. In that controlled situation, blue light can cause people to behave erratically—but it doesn’t mirror what usually happens in everyday human life.

"But the amount of light emitted from our screens is really inconsequentialnieistotny; bez większego znaczenia," says Zeitzer. Your life doesn't match the conditionsodpowiadać warunkom; pasować do warunków of many blue light studies. "We bring someone into the laboratorylaboratorium, and they are exposedpoddawani; wystawiani na działanie to very dimsłaby; przyćmiony light all day longprzez cały dzień. And then they are given a bright light stimulusbodziec," he says. Under those circumstancesokoliczności, blue light makes people go haywirewariować; wymykać się spod kontroli, but it doesn't reflect typicaltypowy; charakterystyczny experience of human life.

“But the light from our screens is not really that important,” says Zeitzer. He says your day is not like most blue light studies. “First, we put someone in a lab where the light is very dim all day. Then we give them a strong bright light,” he says. In that situation, blue light can make people act strangely, but it is not like real life.

After years of warnings and the widespread habit of turning on the blue-light filters built into phones, new research now indicates that screens may not be the primary culprit after all. For instance, a recent review of 11 different studies found that the light emitted by screens delayed sleep by roughly nine minutes at most. It’s not exactly zero, but it’s also not the sort of change that would be life-altering.

After years warnings and millions of people flipping onwłączanie the blue light filters built intowbudowane w their phones, the latest science suggests screens are not the main culpritwinowajca; główna przyczyna problemu here after all. For example, a recent review of 11 different studies and found that the light from screens only delayed sleep by about nine minutes, at worstw najgorszym razie. Not zero, but not life alteringzmieniający życie, either.

After many years of warnings and millions of people turning on the blue light filter on their phones, the new science says that screens might not be the main problem. A new review of 11 studies found that screen light only delays sleep by about nine minutes, at most. It is not nothing, but it also does not change your life.

Studies show that the blue light from phone, laptop, and tablet screens is very small compared with the blue light from the Sun. One study found that using devices for 24 hours was like getting less than one minute of blue light outdoors. Other studies also show that this light is not enough to change the hormones that help you sleep.

The amount of blue light emittedemitowany, wydzielany by the screens of phones, laptops and tablets has also been shown to be tiny compared to the blue light we receive from the Sun – 24 hours-worth of blue light from digitalcyfrowy devices totted upzsumowano, zliczono to less than one minute spent outdoorsna zewnątrz, pod gołym niebem, according to one study. Other studies have shown it's not enough to affect levels ofpoziomy, stężenia the hormoneshormony that control our sleep.

Research has also revealed that the blue light emitted by phone, laptop, and tablet screens is minuscule compared with the blue light we get from the Sun. In one study, the equivalent of 24 hours of blue light from digital devices only added up to less than a minute outdoors. Moreover, other findings suggest that this exposure is insufficient to meaningfully alter the hormone levels that regulate sleep.

So what’s making me feel so exhausted all the time? Zeitzer and several others explained to me that there are many other ways—whether the light is blue or not—that it could be sabotaging my bedtime. And if I truly wanted to take on this “blue monster,” I’d need to make a major lifestyle change.

So why am I so tired all the timeciągle? Zeitzer and others told me there are lots of other ways that light, blue and otherwisezarówno niebieskie, jak i inne, could be ruiningpsujący my bedtimemój czas pójścia spać. If I really wanted to tacklezmierzyć się z the blue monster, it was going to take a serious lifestylestyl życia change.

Why am I tired all the time? Zeitzer and others said light can mess up my sleep at night, not only blue light. If I wanted to fight the blue light problem, I would need to change my life in a big way.

On day one of my experiment, I went out for dinner while the sun was going down. Around 20:30, I said I needed to go home. I needed to stay away from the light. The sleep doctors told me to get ready for bed early, even before I got into my sheets.

On the first day of my experiment, I was still out having dinner when the sun began to set. At about 20:30, I told myself it was time to head home. In other words, it was time to take cover from the light. Following the guidance I was receiving from sleep specialists, I started my no-excuses bedtime routine well before I ever climbed into bed.

I was out for dinner as the Sun went down on day onepierwszy dzień of my experimenteksperyment. Around 20:30, I said I needed to head home. It was time to hide from the light. Based onna podstawie the adviceporada I was getting from sleep specialistsspecjaliści, my extreme bedtime prepping started long before I get under the coverspod kołdrą.

My routine starts with a strange pair of glasses. If you wear normal glasses, you may have been offered a clear coating that says it can block blue light. Studies show it helps only a little. Real blue-blocking glasses are not very cool, and they are not a good choice for most people either.

My routine starts with an absurdabsurdalny, niedorzeczny pair of glasses. If you wear normal glasses, you've probably been offered special clear coatingspowłoki, warstwy ochronne that promise to filterfiltrować, przepuszczać przez filtr blue light. Studies suggest they don't do much. Real blue-blocking glassesokulary blokujące niebieskie światło aren't sexy. Frankly, they aren't a realisticrealistyczny, wykonalny solutionrozwiązanie for most people, either.

My routine begins with an odd, somewhat ridiculous pair of glasses. If you wear standard corrective lenses, you’ve likely been sold “smart” clear coatings that claim they can filter out blue light. Research indicates that these coatings don’t offer much benefit. In other words, genuinely effective blue-blocking glasses aren’t exactly stylish—and, to be frank, they also don’t represent a practical solution for most people.

The best options use deep orange, red, or amber lenses that extend fully around your eyes, blocking light from sneaking in along the sides. Reputable manufacturers back this up with a spectrum report that quantifies exactly how much blue light is transmitted. “You shouldn’t be able to see much blue,” explains Håvard Kallestad, director of the Sleep and Chronobiology research group at the Norwegian University of Science and Technology.

The best glasses have orange, red, or amber lenses. They go around your eyes, so side light cannot get in. Good makers also share a test report that shows how much blue light goes through. “You should not see much blue,” says Håvard Kallestad, who works on sleep and chronobiology research at the Norwegian University of Science and Technology.

The good ones have deep orange, red or amber lensessoczewki that wrap all the way arounddookoła, dookoła całej powierzchni your eyes so light can't get in from the sides. Serious manufacturersproducenci offer a spectrumwidmo report that shows how much blue light gets in. "You shouldn't be able to see much blue," says Håvard Kallestad, director of the sleep and chronobiologychronobiologia research group at the Norwegian University of Science and Technology.

The blue-light goggles I use were designed for people who work with lasers and therefore need proper eye protection. I put them on, then looked out the window. Down the street, there’s a store with a blue neon sign. Once I had the goggles on, the sign’s light disappeared completely—straight to the point, just like I hoped.

The special blue-lightblokujący niebieskie światło googles I have were made for people who work with laserslasery that need eye protectionochrona. I put them onzałożyć je and looked out the windowspojrzałem przez okno. There's a store with a blue neonneonowy sign down the streetw dół ulicy; dalej przy ulicy. With my glasses on, the light from the signświatło z szyldu vanishedzniknął. Bullseyestrzał w dziesiątkę.

I sat on the couch and thought about the things I give up for journalism. I scrolled on Instagram. It looked… orange. I want to see how light affects my sleep, so I did not change how I use my phone, TV, or computer. But these glasses are only the start.

I sat down on the couch, thinking aboutrozmyślając o the sacrificespoświęcenia I make for journalismdziennikarstwo. I scrolled throughprzewijałem/przeglądałem Instagram. It looked… orange. The whole pointsedno; główny sens of what I'm doing is to see how light affectswpływa na my sleep, so I didn't change anything about my phone, TV or computer habits. But the glasses are just the beginningdopiero początek.

I dropped onto the couch and started thinking about the sacrifices I make for journalism. Then I mindlessly scrolled through Instagram. Everything looked… orange. The entire purpose of my experiment is to understand how different kinds of light affect my sleep, so I didn’t alter my phone, TV, or computer routines. Still, these glasses are only the first step.

“I think you should make your apartment like a cave,” Kallestad says. “Keep the light out and use candles.” Modern LED lights make a lot of blue light. Old light bulbs make less, but candles have almost no blue light.

“I think you should transform your apartment into a cave,” Kallestad says. “Simply keep the light from getting in, and rely on candlelight.” Modern LED bulbs give off a large amount of blue light. Traditional incandescent bulbs produce far less, but candles are almost completely free of blue light.

"I think you need to turn your apartmentmieszkanie into a cavejaskinia; norа," Kallestad says. "Just blockblokować; zasłaniać light from entering and use candlelightświatło świec." Modern LED lights produce a ton of blue light. Old school incandescentżarowy; dający żarzące światło bulbs make much less, but candles are almost blue-freepozbawiony niebieskiego światła.

In New York, it’s never really dark where I live. So I put blackout curtains over my windows. Only my phone and a few flickering candles were there in front of the dark. I wasn’t sleepy yet. These next two weeks would be long.

In my part of New York, it never truly gets dark. So I drew thick blackout curtains over the windows, leaving only my phone and a few wavering candles between me and the deep, ink-like gloom. I wasn’t sleepy yet, and I knew the next couple of weeks were going to feel long.

It's never really dark where I live in New York. So I covered my windows with blackout curtainszasłony zaciemniające, with only my phone and a couple of flickeringmigoczący candles standing between me and the inky darknessciemność. I wasn't sleepysenny, chce się spać yet. It was going to be a long couple of weeks.

Experts say the amount of light you get each day is what matters most. If you want to sleep well, get lots of light in the morning, and less light at night. Blue light is important too, but the total amount of light you get is what really helps.

Experts broadly agree that the key factor is the amount of light you receive throughout the day. For the best possible sleep, aim for plenty of light in the morning and significantly less at night. Although blue light has an extra impact, it’s ultimately your overall light exposure that makes the difference.

Experts agree that what really matters is the dosedawka of light of light you're getting through the day. For optimaloptymalny sleep, you want lots of light in the morning and much less at nightznacznie mniej w nocy. Blue light countsliczy się more, but it's your total exposureekspozycja; narażenie that makes the real differenceprawdziwa różnica.

As it turns out, the solution begins the instant you wake up. During my trial, each morning I positioned myself in front of a lamp that looked like something borrowed from a 1980s science-fiction film. While I was making and drinking my coffee, it blasted intense light directly into my face. Since the unit is relatively small, Kallestad advised me to sit as close to it as possible—an experience that was far from pleasant. The lamp is meant to help with seasonal depression, and its medically calibrated light is particularly rich in blue wavelengths, which have been shown to boost alertness when received earlier in the day. At the same time, it appears to “train” my eyes so that they can better resist that blue light later that evening.

The fix starts when you wake up. In my test, every morning I sat in front of a small lamp. It looked like it came from a 1980s science movie. While I drank my coffee, the lamp shone very bright light right in my face. The lamp was small, so Kallestad told me to sit close to it. This was not nice. The lamp is made to help with seasonal depression. The light is more blue than usual. Studies show that blue light can help you feel more awake when you get it earlier in the day. But it also helps your eyes get ready, so the blue light later at night bothers you less.

It turns outokazuje się the solution starts the moment you wake upobudzić się. Every morning during my test, I sat in front of a lamp that looks like a proprekwizyt from a 1980s science fictionscience fiction; fantastyka naukowa movie. It blasts bright light straight into my face while I drink my coffee. The lamp is small, so Kallestad says I need to sit as close to it as possiblejak najbliżej tego. It was not fun. The lamp is designed to treat seasonal depressiondepresja sezonowa, and the clinicalkliniczny temperaturetemperatura of the light is especiallyszczególnie blue, which has been shown to increase alertnessczujność; przytomność umysłu when you get it earlier in the daywcześniej tego dnia. But it's also priming my eyes to fend offodparować; zapobiegać the blue later that night.

“If you get more light in the day, evening light matters less,” Zeitzer says. Before COVID, people were in the light much more than they knew. You saw the sun on the way to work, bright lights in the office, and you walked to get lunch. Now many of us wake up, sit in the same light, and stay there until we go to sleep. Our bodies cannot tell the difference between day and night.”

"The more light that you get during the daytime, the less impact the light in the evening has," Zeitzer says. The pre-pandemicsprzed pandemii world exposed people to a lot more light than they realised. There's the Sun during a commutedojazd do pracy lub szkoły, the piercingprzenikliwy; rażący fluorescentfluorescencyjny; jarzeniowy bulbs of an office, a walk to lunch. Now, so many of us roll out of bedwlec się z łóżka; zwlec się z łóżka and sit under the same lighting conditionswarunki oświetleniowe until we go to sleep. Our bodies can't tell the differenceodróżnić; rozpoznać różnicę between day and night.

“The more daylight you get in the daytime, the weaker the effect of evening light,” Zeitzer explains. Before the pandemic, people were exposed to far more light than they ever thought—whether it was the sun during a commute, the harsh fluorescent lighting in the office, or a walk out for lunch. These days, many of us simply get up and remain under the same lighting conditions all the way through to bedtime. As a result, our bodies struggle to distinguish between day and night.

Go outside. It works faster than using a lamp. Zeitzer says that even on a cloudy, grey day, you may get about 10,000 lux of light. On a sunny day, you can get up to 100,000 lux. But your living room is usually only around 100 lux. And your phone is only about 50 to 80 lux, or less if the screen brightness is turned down.

Leaving the house will fix that faster than any lamp. Even on a grey overcastpochmurny day, Zeitzer says you're probably getting around 10,000 luxluks (the measure of light intensitynatężenie światła). A bright sunny day can hit 100,000 luxluks. By comparisonna tle porównania / w porównaniu, your living room it's probably around 100 luxluks. (And your phone tops outosiąga maksimum around a measlymarny 50-80 luxluks, Zeitzer says, and it's less when you have the brightness down.)

Stepping outside will sort this out more quickly than relying on any lamp. Zeitzer notes that even on a dull, overcast day, you’re likely to receive roughly 10,000 lux—an indicator of light intensity. In contrast, a clear sunny day can soar to about 100,000 lux. Meanwhile, a typical living room is only around 100 lux. And, as Zeitzer adds, a phone can reach at best a rather meagre 50–80 lux—and even less if you lower the screen brightness.

"Go outside if you can, use the lamp if you have to," says Kallestad. Even a 30-minute walk in the morning makes a real difference (just don't forget sunscreen). And if you can get outside againwyjść znów na zewnątrz after 15:00, Zeitzer says that's also surprisingly useful. It further anchorszakotwicza; stabilizuje your body clockzegar biologiczny and directly reduces how sensitivewrażliwy; czuły you are to light in the evening.

Kallestad says, “Go outside if you can. Use the lamp only if you need it.” Even a 30‑minute walk in the morning can help a lot. Don’t forget sunscreen. If you can go outside again after 15:00, Zeitzer says that can also help. It helps your body clock stay on track and makes you less sensitive to light in the evening.

“If you’re able, get outside; if not, rely on the lamp,” advises Kallestad. A brisk 30‑minute walk in the morning can make a meaningful difference—just remember to apply sunscreen. And if you can manage to step out again after 15:00, Zeitzer says that, too, turns out to be unexpectedly beneficial. It helps to lock in your body clock and, importantly, lowers how strongly you respond to light later in the evening.

If you work from homepracować z domu, another tip you can try is a bittrochę; nieco counter-intuitivewbrew intuicji; nieoczywisty. Turn your lights uprozjaśnić światło / zwiększyć jasność świateł bright during the day and start switching them offwyłączać je in the evening. "The real key with light exposureekspozycja; kontakt z czymś is contrastkontrast; wyraźna różnica," Zeitzer says.

If you work from home, you can also try a trick that sounds strange. Turn your lights brighter in the day. Then turn them off later in the evening. “The key is contrast,” says Zeitzer.

If you work from home, here’s another tip that may feel a little backwards at first. Crank your lights up to full brightness during the day, then begin dimming and switching them off as evening approaches. “The real key to light exposure is contrast,” Zeitzer notes.

So, if being glued tobyć przyklejonym do; nie móc się oderwać od your screens keeps you stuck inside all day, away from the sleep-promotingsprzyjający zasypianiu glarerażący blask; ostre światło of natural sunlightnaturalne światło słoneczne, that's bad news. But the blue light coming from those screens contributesprzyczynia się; wnosi wkład little to the wider issueszerszy problem; szersza kwestia of our lifestylesstyle życia. The real problem, Zeitzer says, is what we spend our time doing on our phones and laptops before bed.

If you stay on your screens all day, you may stay inside and miss natural sunlight. Natural light can help you sleep better at night, so this is not good. Also, the blue light from your screens is not the main problem. Zeitzer says the biggest issue is what you do on your phone or laptop before you go to bed.

So, if you find yourself glued to your screens and, as a result, you end up spending the day indoors—far from the sleep-supporting brightness of natural sunlight—that’s not great news. Still, the blue light spilling from those devices plays only a minor role in the bigger picture of how we live. Zeitzer points out that the real issue isn’t the light at all, but rather how we fill our time on our phones and laptops right before bed.

“It’s far more the content, not the light, from these devices that’s keeping people up,” Zeitzer says. And this effect can also vary depending on how light-sensitive you are in the first place—you may be more (or less) sensitive than I am.

“These devices keep people awake more because of what they watch, not because of the light,” Zeitzer says. It also depends on how sensitive you are to light. I may be more sensitive or less sensitive than you.

"It is much more the content, rather than the light, that is keeping people awake from these devices," Zeitzer says. It can also depend on how sensitivewrażliwy, podatny na you are to light in the first placeprzede wszystkim; w ogóle – I might be more or less sensitivewrażliwy, podatny na than you.

I use a sleep tracker to keep tabs on my rest. While it’s not rigorous enough to count as real science, it does offer a fairly useful snapshot. Throughout the experiment, my sleep quality didn’t appear to shift dramatically. That said, I did spot a few changes. Near the end of the second week, I noticed I was slightly more inclined to get into bed on time, and falling asleep seemed to come more easily. By the end of the study, the total amount of time I was asleep hadn’t changed in any meaningful way, but the timing—when I actually fell asleep and when I woke up—was a bit more regular. Could this have been due to blocking blue light? It’s hard to know for sure, but it honestly felt like a real win.

I use a sleep tracker to watch how I sleep. It is not perfect for real science, but it helps me get an idea. During my experiment, my sleep quality did not change much. Still, I noticed some small differences. In the last part of week two, I felt more ready to go to bed on time. It also seemed easier to fall asleep. The total time I slept did not change much by the end, but the time I fell asleep and woke up was more steady. Did blocking blue light help? I can’t be sure, but it felt like a big win.

I use a sleep trackerurządzenie do śledzenia / monitorowania to monitormonitorować, śledzić my rest. It's not good enough for real science, but it's a rough indicationwskazówka, oznaka; przybliżony wskaźnik. The quality of my sleep didn't seem to change much during my experimenteksperyment, badanie. But I did notice some differences. Towards the end of the second week, I found myself a little more motivatedzmotywowany to get into bedpołożyć się do łóżka on timena czas, punktualnie and it seemed easier to fall asleepzasnąć. The amount of time I spent asleep didn't change in any meaningfulistotny, mający znaczenie way by the end of my experimenteksperyment, badanie, but the time I feel asleep and got upwstać in the morning was a little more consistentstały, regularny; spójny. Was this because I blocked blue light? Hard to say, but it felt like a big victoryzwycięstwo; duży sukces.

What I can tell you is that I began to genuinely anticipate my candlelit evenings. It’s entirely possible that this shift alone could have an impact. As Zeitzer notes, when an activity “becomes woven into the pre-bed routine, it can serve as a powerful psychological prompt that helps your body remember what comes next.”

What I can tell you is that I started to enjoy my candle nights. It’s possible that this alone helped. Zeitzer says that when something becomes part of your bedtime routine, it can help your body know what to do next.

What I can tell you is I started to look forward tonie móc się doczekać my candle evenings. It's possible this in itselfsamo w sobie could make a difference. When something "becomes part of the pre-bed processczynności wykonywane przed snem, it can act as a very strong psychologicalpsychologiczny cuesygnał, bodziec to help remindprzypominać your body of what you're supposedrzekomy; mający to be doing next", Zeitzer says.

The same idea applies to your phone’s auto-dimming settings, which reduce a portion of blue light. “It may not work particularly well on its own, but one benefit is that, for some people, these filters—and even blue-blocking glasses worn in the evening—can function like a Pavlovian cue. Once the screen’s color shifts or you put on your glasses, your brain begins to interpret that signal as a prompt to start winding down and getting ready for bed.”

This is also true for the auto-dim on your phone, which cuts down some blue light. “It does not work very well, but it can still help. If you use one of these screen filters, or if you wear blue-blocking glasses in the evening, it can teach your brain to follow a habit. When the screen color changes, or when you put on your glasses, your brain understands it is time to get ready for sleep.”

The same goes for the auto-dimmingautomatycznie przyciemniający features that limit some blue lightniebieskie światło on your phone. "It doesn't really work that well, but the one thing that it can do is that when you have one of these filters, or if you wear blue blockingblokujący glasses in the evening, is that acts as kind of like a Pavlovianpawłowowski, warunkowany odruchowo conditioningwarunkowanie cuebodziec; sygnał for some people. When the screen colourkolor ekranu changes, or you put on your glasses, your brain starts to understand it is time to get ready for bedprzygotować się do snu."

If you come for a sleepover, you won’t see me wearing blue light glasses. I felt much better after I stopped using them, but I might keep using the candles.

If you come bywpaść w odwiedziny for a sleepovernocowanie u kogoś, you won't see me in the blue blocking glassesokulary blokujące niebieskie światło. It was a huge reliefogromna ulga to give them upzrezygnować z nich, but I might keep the candles.

If you stop by for a sleepover, you won’t see me wearing blue-blocking glasses. Letting them go was a huge relief, though I may still stick with the candles.