Morning light has become one of those wellness recommendations you hear everywhere once you start noticing it. Sleep doctors bring it up. Functional medicine experts bring it up. Neuroscientists bring it up. Andrew Huberman has built entire protocols around it. And unlike so many wellness trends, this one is not about buying something new. It is about stepping outside early in the day and giving your body the signal it has been designed to respond to all along.
So why is everyone suddenly so obsessed with getting light in the morning? The answer has less to do with romanticizing a sunrise routine and more to do with circadian rhythm, cortisol timing, alertness, mood, and sleep.
The Case of Morning Light
For readers who want to go straight to the source, Huberman outlines his morning light protocol in his newsletter Using Light for Health. In it, he writes, “View morning sunlight!” and says, “I consider viewing morning sunlight in the top five” actions that support mental health, physical health, and performance.
He also goes deeper on the science of timed light exposure in the Huberman Lab episode Using Light: Sunlight, Blue Light & Red Light to Optimize Health, which covers how light can affect sleep, alertness, hormones, mood, and overall circadian timing.
Huberman’s case for morning light is not just that it makes you feel more awake in the moment. It is that morning light helps set the timing of your entire day.
In Using Light for Health, he explains that viewing sunlight within the first hours after waking, even through cloud cover, increases early day cortisol release. He calls that the ideal time for elevated cortisol. He also says this morning signal helps prepare the body for sleep later that night and may positively influence immune function, metabolism, and daytime focus.
That is the key distinction. Cortisol is not automatically bad. A morning rise in cortisol is part of a healthy daily rhythm. The issue is when that rhythm gets flattened, delayed, or pushed later into the day, which modern life makes very easy to do.
Why Cortisol Needs Better PR
Cortisol has become wellness culture’s favorite villain, but the body is supposed to produce more of it in the morning. Research on the cortisol awakening response describes a normal rise in cortisol after waking, which helps the body transition into daytime alertness.
The problem is not having cortisol. The problem is timing. Ideally, the body gets a strong daytime cue in the morning, then gradually moves toward a calmer, lower light state later in the day.
Morning light helps reinforce that rhythm. It tells the brain: this is daytime, be alert now, wind down later. It is less about chasing a perfect morning routine and more about giving your body a clear biological timestamp.
Why Other Experts Keep Repeating It Too
Huberman may be one of the loudest voices on morning light, but he is not the only one saying it.
Michael Breus, PhD, known as The Sleep Doctor, told WebMD, “Every single human, just as soon as possible after waking up, should go outside and get at least 15 minutes of direct natural light. Period.” That may sound intense, but the logic is simple: morning light helps reset the body clock and supports better sleep later.
Cleveland Clinic makes a similar point. In a Cleveland Clinic piece on sunlight, Neha Vyas, MD, says, “The health benefits of sunlight can include improving your vitamin D level, your sleep and your mood.” The same article notes that getting sunlight in the morning helps wake us up and regulate the sleep and wake cycle. It also gives the important reminder that sun needs vary by person, and that sunscreen and avoiding prolonged exposure still matter.
The National Sleep Foundation puts it plainly in its guidance on light and sleep: bright, natural light helps you wake up, while dim, dark environments help you go to sleep. The organization also notes that circadian rhythm is especially sensitive to light about one hour after your usual wake time and again in the hours before bed.
What The Research Actually Shows
The research behind morning light is really research about circadian rhythm, which is the body’s internal clock. This clock helps coordinate sleep, wakefulness, body temperature, hormones, metabolism, and mood.
Light reaches the eye and sends signals to the brain’s circadian pacemaker. From there, the body begins coordinating what should happen next. Morning light tells the system that the day has started. Evening darkness tells the system that it is time to wind down.
A 2025 study on sunlight and sleep regulation found that morning sunlight exposure before 10 a.m. was associated with earlier sleep timing and better overall sleep quality. In that study, every additional 30 minutes of morning sunlight was associated with a 23 minute earlier midpoint of sleep.
The takeaway is not that morning light is magic. It is that light timing matters. Morning light helps anchor the day. Evening darkness helps protect the night. Your body needs both signals.
How To Make Morning Light Actually Happen
The best version of this habit is the one you will actually do. Huberman recommends getting outside within the first hours after waking. On a sunny morning, he suggests 5 to 10 minutes outside. On overcast days, he recommends increasing that to at least 15 to 20 minutes, since there is still enough sunlight coming through cloud cover to trigger positive effects.
The key detail is that outdoor light matters. Huberman notes that trying to get this effect through a window or windshield is not ideal because too much of the relevant light signal gets filtered out. Contacts and regular eyeglasses are fine, but sunglasses and blue blockers reduce the effect.
This also does not mean staring directly at the sun. Face toward the general direction of natural light, keep your eyes relaxed, blink normally, and do not look at anything painful. Think of it as letting daylight reach your eyes, not turning your morning into a staring contest with the sky.
The easiest way to make it stick is to attach it to something you already do. Take your coffee outside. Walk around the block. Step onto the patio before opening email. Sit near natural light after waking, then move outside when you can. If you wake before sunrise, turn on bright indoor lights first, then get outside once the sun is up.
For anyone who wakes before the sun, this is also where a sunrise alarm can make the habit feel less brutal. A device like Hatch Restore can gradually brighten your room before your alarm goes off, creating a softer wake up cue before you get outside for actual morning light. It is not a replacement for sunlight, but it can help make the first few minutes of the morning feel less like being dragged into consciousness by your phone.
The goal is not perfection. The goal is consistency. You are giving your brain a repeatable cue that the day has started. SHOP HATCH RESTORE HERE
The Nighttime Piece Matters Too
Morning light works best when it is paired with lower light at night. This is where most of us make the habit harder on ourselves.
The same system that responds to sunlight in the morning also responds to bright screens, bathroom lights, kitchen lights, and late night scrolling. The National Sleep Foundation notes that light exposure at night can reset the body’s natural clock, promote wakefulness at the wrong time, and disrupt sleep.
Huberman’s broader light guidance follows the same pattern: bright light early, bright enough light during the day, and much less light in the evening and at night. His cortisol episode also includes guidance around lowering evening cortisol with dimmer lights and warmer light color.
This is where your home environment can help. Swapping harsh overhead lighting for warmer, lower-blue options at night is one of the more realistic ways to support that transition. BON CHARGE’s blue light blocking light bulbs are designed for circadian-friendly lighting, with options like blue light blocking bulbs, low blue light bulbs, full spectrum bulbs, lamps, and night lights that help create a softer light environment after dark.
So yes, get outside in the morning. But also consider what your eyes are getting at night. Dim the lights, lower screen brightness, switch to warmer bulbs where it makes sense, and stop treating your bedroom like a tiny airport terminal.
