Being a high performer is such a unique experience.

You plan your week.

You track your macros.

You protect your deep work hours.

You optimise your morning routine, your caffeine timing, and your training schedule.

But you're still tired.

Not the kind of tired that a good night's sleep fixes.

The kind that's always there. Sitting underneath everything. A low hum of fatigue that no amount of caffeine helps (not that we rely on caffeine for energy here, right?).

You try to figure out what's making you so tired.

You assume it's the workload. The season. The fact that you're building something from scratch, and this is just what it costs.

But what if the real problem isn't how much you're doing?

What if it's what's happening — or not happening — while you sleep?

Here's a brutal truth about most high performers: you will do almost anything to optimise your performance except fix your sleep.

You'll spend money on supplements, tracking devices, and productivity tools.

You'll spend hours researching the perfect morning routine.

You'll read every book on deep work and discipline.

And then you'll stay up until 1 am, sleep inconsistently, wake up groggy, down an espresso, and wonder why you can't get into flow.

Sleep deprivation doesn't feel dramatic.

And that's the trap.

It doesn't knock you flat like an injury.

It quietly degrades everything else— your cognition, your mood, your creativity, your physical recovery — until "functioning below your best" becomes your new normal.

And because it happens gradually, you adapt to the feeling. You don't notice it as a problem. It's just 'who you are'.

Your cognitive performance degrades significantly. After 17 to 19 hours awake, your impairment is equivalent to a blood alcohol level of 0.05%.

The decisions you make, the content you create, the problems you solve — all happening on a less-than-optimal brain.

And here's what makes it worse: sleep deprivation also impairs your ability to perceive how impaired you are.

You think you're fine. You're not.

Your emotional regulation breaks down. The amygdala — the brain's emotional centre — becomes significantly more reactive when you're underslept. You're more irritable, more anxious, and more likely to catastrophise. The composure you worked to cultivate gets quietly dismantled every night you don't sleep well.

Your body stops recovering. Sleep is when your body repairs tissue, clears metabolic waste from the brain, and regulates the hormones governing hunger, stress, and growth. Shortcut your sleep, and you're building on a foundation that never fully recovers.

Your creativity suffers. REM sleep — the dreaming stage — is where your brain makes novel connections between ideas. Many of the insights people attribute to showers and walks are actually the delayed output of quality REM sleep.

Poor sleep doesn't just make you tired. It makes you duller. Slower. Less able to see what's right in front of you.

You can't outwork bad sleep. You can only accumulate the debt.

Most people who are chronically underslept aren't sleeping badly because they don't care. They care deeply. They just don't know that they're optimising the wrong things.

The problem usually isn't the number of hours.

It's the quality.

And quality comes down to something most people overlook: light and consistency.

My best sleep wasn't the result of a fancy tracker or a complicated protocol.

It was 2022.

My final year of university. On top of the coursework, I was also training for a kickboxing competition and building my first business on the side.

That was also the year I read Dr Matthew Walker's Why We Sleep. It changed the way I thought about sleep entirely. Up until that point, I knew sleep was important. But after reading his book, I understood that sleep was the foundation. Not a recovery tool, not a reward for hard work, but the foundation underneath everything else I was trying to build.

So I got (a little) obsessive about it.

9 pm in bed. Same time, every night. 5 am. Same wake time, every morning. No negotiation. I was so serious about it, I told friends and family, especially my mom, not to call after 9 pm.

The easy part, for me, has always been waking up on time. I'll be up — even if I went to bed late, even if I'm groggy.

The hard part has always been getting to bed on time. But that year, I was relentless about it.

And the result?

I felt incredible. Waking up before my alarm most mornings. Stable energy through the day. Sharp thinking. Even stable mood. My body and mind were working together instead of against each other.

Then that season ended. The extreme discipline softened. Life shifted. And gradually, so did my sleep.

This year, I wanted it back — but adjusted for a different life. I wasn't in monk mode. I needed a system, not just willpower.

So I started experimenting and learning.

Your body operates on an internal circadian rhythm — from the Latin circa (approximate) and diem (day).

It's a roughly 24-hour internal clock that governs when you feel awake, when you feel sleepy, when your hormones peak, and when your cells repair and regenerate.

What most don't know is that the human internal clock actually runs on a cycle of approximately 24.2 hours.

This means without external input, you would drift out of sync with the solar day by about 12 minutes every day. Over 10 days, that's a 2-hour shift — the equivalent of giving yourself chronic jet lag without going anywhere.

Your body needs a daily reset signal to stay synchronised with the world.

That signal is light.

Beyond your conscious vision, your retina contains a set of specialised cells called intrinsically photosensitive Retinal Ganglion Cells, or ipRGCs.

These cells have one job: to detect the presence and absence of light and communicate that information directly to your brain's master clock, the Suprachiasmatic Nucleus (SCN).

The SCN uses this information to synchronise every cell and organ in your body with the time of day. Every cell in your body needs to know what time it is. The SCN is how it finds out.

This is why light has effects that go far beyond conscious vision.

It regulates your hormones, your mood, your alertness, your metabolism, and your sleep. And it does all of this largely outside your conscious awareness — whether you think about it or not, your light environment is continuously shaping your biology.

The hormonal dance: cortisol and melatonin

Two hormones sit at the centre of your sleep-wake cycle:

Cortisol is your wake signal. Released from the adrenal glands in the morning, it drives alertness, focus, and energy. Cortisol gets a bad rep. Mainly because we associate with stress, specifically chronic stress. But cortisol is what keeps us alive, and in the case of morning cortisol, what wakes us. Problems arise when it's released at the wrong time, which is what happens with poor sleep and irregular schedules.

Melatonin is your sleep signal. Also known as the hormone of darkness. It's released by the pineal gland as light fades and signals to your body that it's time to wind down and eventually sleep. Crucially, melatonin production is suppressed by light. This is why it's recommended to avoid bright lights at night. The nuclei in your eyes that sense light are very sensitive to light at night. And the light at night tells your brain that it's still day, hence why you stay up at night. Melatonin gets blunted. Your sleep signal is delayed.

Here's the critical mechanism: your morning light exposure triggers the cortisol pulse, which starts a biological timer. Melatonin begins to rise approximately 12 to 14 hours later. If you get morning light at 7 am, expect sleepiness around 9 to 10 pm. Your evening biology is determined by your morning behaviour.

Morning light: the most important thing you're not doing

Getting sunlight into your eyes within the first hour of waking is one of the highest-leverage interventions for sleep, mood, energy, and overall performance. This is well-supported by the work of Dr Andrew Huberman and Dr Samer Hattar, Chief of the Section on Light and Circadian Rhythms at the NIH.

The practice is simple: get outside within 30 to 60 minutes of waking. Aim for 10 to 15 minutes on a bright day, 20 to 30 minutes on an overcast day. No sunglasses. You don't need direct sunlight — shade provides enough photons. But you do need to be outside. Viewing sunlight through a window or windshield is up to 50 times less effective than being outdoors. So get outside.

Morning sunlight anchors your cortisol pulse, sets the melatonin timer, activates dopamine release, and synchronises your entire circadian system for the day ahead.

Evening light: where most people undo everything

As the sun sets, your biology expects light to fade. Melatonin begins to rise. Your body prepares for sleep.

But most of us spend our evenings under bright overhead lights and in front of blue-spectrum screens — phones, laptops, televisions — sending our brains the signal that it's still the middle of the day. Melatonin production is suppressed. The sleep signal is delayed or weakened.

Dr Huberman notes a critical detail here: the neurons that respond most strongly to light and activate the circadian clock are located at the bottom of your eyes — they evolved to detect overhead light, like sunlight. This means overhead artificial lights at night are particularly disruptive, closely mimicking what sunlight does during the day.

The fix isn't complicated. Dim your environment as the evening progresses. Switch off overhead lights and use floor lamps, desk lamps, or warmer, lower light sources.

Between 10 pm and 4 am, even small amounts of light — a phone screen viewed in bed, an overhead bathroom light — can suppress melatonin and disrupt the following day's rhythm. Very dim red light (below 10 lux) has almost no impact on the circadian clock and is the safest option for evening use.

Consistency: the variable that makes everything compound

Here's what I discovered through my own experience — and what the research confirms: the body averages your light exposure and your sleep-wake times over multiple days. Consistency is the compounding variable.

The more regularly you sleep and wake at the same times, the more precisely your circadian rhythm can anticipate and prepare for each transition. Your biology becomes predictable. Melatonin rises on schedule. Cortisol pulses at the right time. You start waking up before your alarm. You start feeling naturally sleepy at your target bedtime.

Irregular sleep — even if the total hours add up — is the equivalent of giving yourself jet lag on a weekly cycle. Your body is perpetually catching up.

Back to this year and the colour-changing LED bulb.

I bought it for aesthetics. A fun way to add some colour to my bedroom. But as I was thinking about how to rebuild my sleep consistency, I realised it could be something more — a sleep performance tool.

Here's what I set up:

Two hours before bed, the lamp turns red.

Red light sits at the far end of the visible spectrum, well away from the blue and green wavelengths that suppress melatonin. It was the closest I could get to a sunset signal indoors. When the lamp shifted to red, it did two things: it reduced my light-based melatonin disruption, and it became a ritual anchor. A cue. Wind-down mode. The lamp going red meant the day was ending — phone down, stimulation lower, pace slower.

At 10 pm, the lamp switches off entirely.

This was a simple but powerful forcing function. The room going dark made bed the obvious next move. It removed the low-grade temptation to keep going — to scroll for another ten minutes, to watch one more thing. The environment decided for me.

Five minutes before my alarm: the lamp turns on to a bright, warm white.

This is where it got interesting. My theory was that light hitting my eyes before the alarm would begin the waking process naturally — pulling me toward wakefulness rather than the jarring sound of my alarm waking me up. And it worked. On more mornings than I can count, I woke up before the alarm. Not from the sound. From the light.

On the mornings when I was in deep sleep or facing away from the lamp, the light still helped: it kept me awake once the alarm sounded, waking me up instead of being pulled to the familiar seduction of the pillow.

Artificial light is nowhere near as powerful as sunlight in terms of lux, and real morning sun exposure is still the priority once I'm up and dressed. But as a system — especially for winter, when it's dark at 5 or 6 am — the lamp has been a reliable bridge.

The more consistently I used this system, the more I noticed the compound effect. Energy that stabilised through the day. Waking up before my alarm more regularly. Feeling naturally tired around my target bedtime. The body clock synced itself to the signals I was giving it.

Small interventions. Consistent signals. Compounding results.

Here's how to build this for yourself. Start simple and layer in consistency over time.

Step 1: Anchor Your Wake Time

Decide on a consistent wake time and protect it — weekdays and weekends. This is the foundation. Your wake time anchors your entire circadian rhythm.

Everything else in this protocol is built on top of it.

If you need flexibility on weekends, push it back by no more than one hour. Anything more and you're creating social jet lag — the circadian equivalent of flying to a different time zone every Friday night.

Step 2: Calculate and Protect Your Bedtime

Work backwards from your wake time. Most adults need 7 to 9 hours of sleep opportunity (time in bed, not just time asleep). Once you've found your bedtime, protect it.

Not rigidly — life happens, and dinner with people you love is worth it — but most nights, you go to bed at the same time.

Consistency here is more important than perfect hours. An irregular 8 hours is worse than a consistent 7.

Step 3: Get Morning Light Within 60 Minutes of Waking

Go outside.

Five to fifteen minutes on a clear day, twenty to thirty on an overcast one.

No sunglasses. You're not staring at the sun — you're exposing your eyes to the natural light environment.

If it's winter and still dark when you wake, use a bright artificial light indoors as a bridge and get outside as soon as the sun is up. Even ten minutes of outdoor light later in the morning is significantly better than none.

This is the highest-leverage step in the protocol. It sets your cortisol pulse, starts the melatonin timer, activates dopamine, and anchors your entire sleep-wake cycle for the day.

Step 4: Dim Your Environment 2 Hours Before Bed

As you approach bedtime, shift your home lighting toward warmer, dimmer, lower-positioned sources. Switch off overhead lights. Use floor lamps or desk lamps instead. If you have a smart bulb, automate it — remove the decision entirely.

Avoid bright screens for at least an hour before bed. If you need to use a device, dim the screen to its lowest setting and tilt it slightly downward — reducing the amount of overhead-angle light hitting the bottom of your eyes.

Blue light blocking glasses can help, but are not a substitute for dimming your environment. Bright light is disruptive regardless of spectrum — the intensity matters as much as the colour.

Step 5: Build a Wind-Down Anchor

Choose one consistent activity that signals the transition to rest. This is your keystone habit — the cue that sets the rest of your evening routine in motion. It doesn't need to be elaborate.

Mine is as simple as an alarm going off, followed by tidying the kitchen. That one act shifts my mode. Everything that follows — lower lights, less stimulation, the rest of my wind-down routine — flows from that anchor.

Other anchors that work well: a specific playlist, a short stretching routine, brewing herbal tea, or a five-minute journal. The activity matters less than the consistency of it.

Step 6: Make the Bed a No-Device Zone

This one is simple but underestimated. Most people associate their bed with scrolling, watching, and stimulation — which actively trains the brain to be awake and alert in the place where you need it to be calm and sleepy.

When you make the bed a device-free space, you begin to rebuild the association between bed and sleep. The nervous system learns: this place means rest.

Over time, that association becomes a powerful sleep trigger in itself — lying down starts to feel like the cue to wind down, not to engage.

Step 7: Track the Compound Effect

Give yourself two to three weeks of consistency before you evaluate. Sleep quality compounds slowly and then noticeably.

The signals to look for:

These aren't dramatic overnight changes. They're signals that your circadian system is starting to work with you. And once it does, it keeps working — compounding quietly in the background, night after night.

There's a version of the hustle culture narrative that treats sleep as the thing you earn after a productive day. You do the work, and if there's time left over, you rest.

That model is backwards.

Sleep is not a reward for the work. Sleep is what makes the work possible.

The sun is our oldest biological partner. It has been setting the rhythm of human performance since before we had language to describe it.

Light and darkness, morning and evening — these aren't just environmental conditions. They're the inputs your biology is designed to run on.

When you align your behaviour with those signals — consistent wake times, morning light, dimmed evenings, protected sleep — you're not hacking your biology. You're working with it for the first time.

You can optimise everything. But nothing compounds until the foundation is solid.

Sleep is the foundation. Protect it accordingly.

Thank you for reading.

I hope it helped.

See you in the next one.

— Shana