Bedroom Blackout: How to Create Perfect Darkness for Better Sleep

Light is the strongest regulator of our internal clock. Even small amounts of light at night – the streetlamp outside the window, the standby light of the television, or the first rays of sun at five in the morning – can inhibit the production of the sleep hormone melatonin and make sleep shallower. Those who properly darken their bedroom demonstrably fall asleep faster, wake up less often, and feel more refreshed in the morning. In this guide, we show you how to darken your bedroom – from choosing the right curtains to blinds and shutters, and even addressing the small light sources many overlook.

The short answer: Combine comprehensive window darkening (blackout curtains, blackout blinds, or external shutters) with the elimination of all small light sources in the room. The goal is a darkness where you can barely see your own hand in front of your eyes – only then can the body release melatonin undisturbed and enter deep, restorative sleep phases.

Why darkness is so crucial for good sleep

Our internal clock has been guided by the alternation of day and night for millennia. When light hits the retina, it signals to the brain: it's day, be awake. We are particularly sensitive to blue light – which is why screens in the evening are so sleep-disrupting. But white or yellowish light at night also has measurable consequences: studies show that even illuminance levels of around 10 lux – comparable to a bright streetlamp – can inhibit melatonin production and alter sleep architecture.

The consequences: you take longer to fall asleep, deep sleep and REM phases are shortened, and you wake up more frequently at night. Those suffering from insomnia should therefore first examine the lighting situation in their bedroom – often, this is the easiest adjustment to make.

The best methods to darken the bedroom

Blackout curtains: The classic choice

Blackout curtains are made from densely woven or coated fabrics that block 90 to 99% of incoming light. They are available in many colors and also improve room acoustics and thermal insulation. Important for their effectiveness: the curtain should be mounted significantly wider and higher than the window – ideally 20–30 cm beyond the edges and reaching to the floor. This prevents the typical bright light strips at the sides.

Blackout blinds and pleated blinds

Blinds with a blackout coating sit closer to the window glass and are well-suited for smaller windows or skylights. Models with side guide rails (cassette blinds) offer virtually light-tight closure and achieve almost 100% darkening. For rental apartments, there are clamp variants that require no drilling – ideal if you're not allowed to make holes in the window frame.

Window shutters and blinds: The Swiss solution

In Switzerland, external roller shutters and Venetian blinds are widespread – and they are the most effective darkening method available. Because they block light before it reaches the pane, there are hardly any light gaps, and in summer, they also keep the heat out. This doubly supports good sleep, as the ideal sleeping temperature of 16–19 °C is easier to maintain in a shaded room.

Comparison: Which darkening solution is right for you?

The underestimated disruptors: Small light sources in the room

Even the best blackout blind is of little use if half a dozen LEDs are glowing in the room. Take the test: turn off all lights in the evening and look around. Typical disruptors are:

• Standby lights from the TV, router, or chargers – tape them up or connect them to a switchable power strip
• Illuminated alarm clock displays – dim them, turn them around, or replace them with an analog alarm clock
• The smartphone – notifications can make the display light up; it's best to keep it outside the bedroom, which also benefits overall sleep hygiene
• Light gap under the door – a simple draft stopper can help

Sleep mask: The flexible alternative

If structural measures are not possible – for example, in a hotel, during shift work with daytime sleep, or in a rental apartment with a landlord's veto – a well-fitting sleep mask is the easiest solution. Look for soft, breathable materials and a contoured shape that doesn't press on your eyelids. For side sleepers, there are flat models that don't slip when lying on the pillow.

Darkness is half the battle – the bedding is the other half

A perfectly darkened room is of little use if the body cannot find a comfortable position on a worn-out mattress. Darkness ensures that you fall asleep faster – a mattress that conforms to the body ensures that you also stay asleep. At Ora, we deliberately forgo the outdated concept of rigid firmness levels, which was never standardized and confuses more than it helps: The Ora Ultra automatically adapts to your body and sleeping position thanks to EvoPoreHRC premium memory foam – for every body type, without guesswork in selection.

Frequently Asked Questions about Darkening the Bedroom

How dark should the bedroom be?

As dark as possible: Ideally, the environment should be under 5 lux, where you can barely see your own hand in front of your eyes. Even at around 10 lux, light can measurably dampen melatonin secretion and make sleep shallower.

Which is better: blackout curtain or blind?

A cassette blind with guide rails provides the most complete darkening, while a curtain is more flexible and also improves acoustics and room climate. The best effect is often achieved by combining them: a blind directly on the window plus a curtain in front.

How can I darken a bedroom without drilling?

Clamp blinds, adhesive blinds with suction cups, clamp curtain rods, and statically adhesive blackout films require no holes – ideal for rental apartments. Additionally, a sleep mask helps as an immediate solution.

Is it unhealthy to sleep in a completely dark room?

No, on the contrary: complete darkness corresponds to the natural nighttime state and promotes melatonin production. If you need to orient yourself at night, you can use a motion-activated night light with warm, heavily dimmed light near the floor.

Does darkening also help against early waking in summer?

Yes. In summer, the sun in Switzerland sometimes rises before 6 AM. Good darkening prevents the morning light from waking up the internal clock too early – external shutters are particularly effective, as they also keep out the heat.

This article is for general information purposes only and does not replace medical advice.