You have turned the big light off. You have put the phone face down, or at least tilted it. You are lying there anyway, wide awake, while your body insists on a daytime schedule you did not ask for.
Most wind-down advice starts with what you do in bed. The biology starts earlier. Your body begins preparing for sleep roughly two hours before you close your eyes, and the single biggest input to that preparation is the light reaching your eyes. Get that part right and the rest of your routine has something to build on. Get it wrong and no amount of herbal tea will make up the difference.
Why a wind-down is a biological process, not a mood
Your internal clock reads light to decide what time it is. As evening arrives, falling light levels allow melatonin to begin rising, core body temperature to start dropping, and alertness to ease off. This sequence is supported by circadian research and it runs on a schedule. It does not respond well to being rushed.
Modern evenings send the opposite signal. Overhead LEDs, laptops and phones deliver bright, blue-rich light at exactly the point your clock expects dimness. Your brain reads this as daytime and holds melatonin back. The result is the familiar pattern: tired, but not sleepy. If you want the mechanism in more detail, our guide on how long before bed to stop using screens walks through the two-hour window step by step.
Step one: manage the light first
Light management is the foundation of an effective wind-down because it is the signal your clock weighs most heavily. Everything else in this protocol works better once the light is handled.
There are two practical ways to do it. You can change your environment: lower the lamps after sunset, use warm bulbs, and move away from overhead lighting. This helps, but most homes and every screen still emit meaningful blue and green light, even at low brightness. Or you can change what reaches your eyes directly.
This is where evening lenses earn their place. Our Night lens filters up to 95% of blue light and suits a gradual wind-down from sunset, particularly if you are still working or cooking. Our Night+ lens blocks 99.9% of blue light and is built for the final two hours before bed, when you want the strongest signal of night your eyes can receive. If you are unsure which suits your evening, our comparison of amber and red lenses sets out the difference plainly.
Worn once, either lens does the work that would otherwise mean changing every light source in the house, every night. You can keep your evening as it is. You change the light.
Step two: let your temperature fall
Sleep onset is linked to a drop in core body temperature, which begins in the evening as part of the same circadian sequence. You can support it rather than fight it.
- Cool the bedroom. A room around 16 to 19 degrees Celsius suits most people.
- Take a warm shower or bath about an hour or two before bed. The warmth draws blood to the skin, and the cooling afterwards supports the natural temperature decline.
- Wear light layers. Heavy bedding early in the evening can hold heat in when your body is trying to release it.
Step three: lower the stimulation, not just the brightness
Light is one input. Content is another. A tense email, a heated group chat or a gripping episode keeps your nervous system in a state of alertness that dim lighting alone will not undo.
- Move work and decisions earlier. Set a cut-off for email and planning at least an hour before your wind-down starts.
- Choose lower-intensity content. Familiar, slower material asks less of your attention than news or social feeds.
- Write tomorrow down. A short list on paper gives a busy mind somewhere to put its open loops.
Step four: anchor the timing
A wind-down works best when it starts at the same time most nights. Your circadian system is a timing mechanism, and it responds to reliable signals with reliable sleep.
Pick a start time around two hours before your intended sleep time. If you sleep at 10:30pm, that means beginning around 8:30pm. Put your lenses on, bring the lights down, and let the rest of the protocol follow. A steady wake time the next morning, followed by outdoor light, closes the loop and makes tonight easier to repeat.
What a full evening looks like
Here is how the pieces fit together on a typical night:
- Around sunset: lower the lights and put on our Night lens if you are still on screens.
- Two hours before bed: switch to our Night+ lens, cool the house, and set work aside.
- One hour before bed: warm shower, slower content, tomorrow written down.
- Bed: dark, cool and quiet.
None of it is complicated. The light step is simply the one that makes the others work, which is why we put it first. You can see the full range in our Night+ red lens collection.
Frequently Asked Questions
How long should a wind-down routine be?
Around two hours is a useful target, because that is when your body begins its own preparation for sleep. You do not need to be idle for all of it. You simply want the light and the stimulation to be lower than they were during the day.
Do I need to stop using screens completely?
No. The aim is to reduce the biological cost of screens, not remove them from your evening. Managing the light that reaches your eyes lets you keep your routine while still giving your body the signal that night is arriving.
Should I wear Night or Night+ for my wind-down?
Our Night lens suits a gradual wind-down from sunset. Our Night+ lens is built for the two hours directly before bed. Many people use both across a single evening.
How long before I notice a difference?
The circadian system responds to repeated, consistent signals, so most people find a steady routine over one to two weeks more useful than any single night.
Is this a treatment for insomnia?
No. This protocol is aimed at supporting healthy evening habits, not treating a sleep disorder. If you have persistent difficulty sleeping, speak with your doctor or a sleep specialist.
Night+ blocks 99.9% of blue light. Night filters up to 95% of blue light. Independently verified by APR Laboratory (NATA #15508).
Balterra products are not medical devices and are not intended to diagnose, treat, or cure any condition.