
Light plays a crucial role in helping us sleep, and some lights and colours are more beneficial than others. While blue light is known for its calming effect and can reduce stress, it can also keep you awake as the brain reacts to blue light by thinking it's daytime, triggering wake hormones. Red light, on the other hand, is ideal for the evening as it helps regulate melatonin production and adjusts your eyes to the dark, making it easier to fall back asleep. Sunrise alarm clocks, such as the Philips SmartSleep Wake-Up Light HF3520, offer red-tinted dawn and dusk simulations, gradually filling the room with bright white light to wake you up.
| Characteristics | Values |
|---|---|
| Blue light | Increases alertness and reduces sleep quality |
| Red light | Promotes sleep by regulating melatonin production and adjusting eyes to darkness |
| Green light | Reminiscent of nature, creating a restful environment |
| Brightness | Excessive brightness disrupts sleep |
| Sunrise alarm clocks | Mimic the sunrise and sunset, stimulating cortisol to help the body wake up and fall asleep naturally |
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What You'll Learn

Red light helps regulate melatonin production
Light plays a crucial role in helping us sleep, and certain colours are more beneficial than others. Our internal clock, or circadian rhythm, keeps track of the day's natural light and darkness cycle. Circadian rhythms are responsible for maintaining body temperature, hormone production, and our sleep-wake cycle.
The brain associates blue light with daytime, triggering wake hormones instead of sleep hormones. Red light, on the other hand, is associated with sunset and signals to our brain that it's time to sleep.
Sunrise alarm clocks like the Philips SmartSleep Wake-Up Light HF3520 use this to their advantage, starting with a gentle, red-tinted glow that gradually grows into a bright white light, mimicking the sunrise. This is designed to signal to your brain that it's time to wake up.
If you're looking for a red-tinted alarm clock, you might want to consider the Hatch Restore, which offers dozens of fully adjustable light and colourscape options for your bedtime routine, or a "radio-controlled thermo clock" that only lights up when you touch the front screen panel.
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Blue light can disrupt sleep
It is important to maintain a healthy circadian rhythm, or internal clock, which is responsible for maintaining our sleep-wake cycle. To do this, we need to get plenty of natural light, which is rich in blue light frequencies, during the day. However, at night, we should avoid blue light, as it can disrupt our sleep.
Sunrise alarm clocks can be helpful in regulating your sleep-wake cycle. These alarms mimic the sunrise, starting with a soft, red-tinted glow that gradually grows into a bright white light. This can help to gently wake you up and make you feel less groggy in the morning.
To improve your sleep, it is recommended to create a sleep-friendly zone in your bedroom. This includes keeping the space clutter-free and choosing soft, calming colours like pastels and muted tones. Red light is a good option for bedtime as it helps regulate melatonin production and is easier on the eyes.
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Sunrise alarm clocks stimulate cortisol, the hormone that helps your body wake up naturally
Sunrise alarm clocks are designed to stimulate cortisol, the hormone that helps your body wake up naturally. Sunrise alarm clocks, such as the Hatch Restore, mimic the sunrise by starting with a soft, red-tinted light that gradually brightens into a white light similar to daylight before your wake-up alarm sounds. This process kickstarts a real-time hormone change in your body, making it easier to wake up and feel less tired during the day.
The human body is built to wake naturally with the sunrise and feel sleepy as the sun sets. The light at the beginning and end of the day is a warm, golden tone, unlike the bright, blue light of midday sunlight that keeps us awake. Sunrise alarm clocks help signal to your brain that it's time to wake up, and the growing light makes it harder to ignore. This can be especially helpful for those who have trouble waking up with a traditional alarm.
The colour red is often associated with warm and energetic hues, but it can also play a role in helping us wind down at night. Red light helps regulate melatonin production, which is crucial for a good night's sleep. It also helps our eyes adjust to the dark, making it easier to fall back asleep if we wake up in the middle of the night. When choosing an alarm clock, it's important to consider the overall vibe of your bedroom and create a sleep-friendly zone. This includes keeping the space clutter-free, choosing calming colours, incorporating elements from nature, and paying attention to lighting.
Smart use of technology can also improve our sleep habits. This includes giving yourself a tech curfew, keeping your bedroom a gadget-free zone, and using night modes to reduce blue light exposure before bed. By balancing our use of technology with healthy sleep habits, we can create a restful environment that promotes better sleep.
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Soft, dim light with warm hues helps prepare for sleep
Light plays a crucial role in helping us sleep. Our bodies are finely tuned light sensors, and our internal clock, or circadian rhythm, keeps track of the day's natural light and darkness cycle. To maintain a healthy circadian rhythm, we need bright light during the day and dim light at night.
Blue light, for example, is known for its calming effects and can reduce stress. Green hues remind us of nature, helping to create a restful environment. Cool colors can lower heart rate and blood pressure, promoting better sleep. However, blue light can also keep you awake, as the brain reacts to blue light by thinking it's daytime, triggering wake hormones.
Red light, on the other hand, is ideal for the evening as it signals to the brain that it is sunset. Red light also helps regulate melatonin production, which is key to getting a good night's sleep. It also helps your eyes adjust to the dark, making it easier to fall back asleep if you wake up.
Orange and peach lights can also help prepare for sleep, and some sunrise alarm clocks utilize these warm hues to help you wake up gently. The Hatch Restore, for example, starts with a soft red light and some music before switching to ocean sounds. The Philips SmartSleep Wake-Up Light HF3520 is another sunrise alarm clock that gradually emits red-tinted light to wake you up gently.
If your alarm clock is too bright, you can try dimming the display or covering it with colored tape to reduce the brightness.
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The brain associates blue light with daytime
Light plays a crucial role in helping us sleep, and certain colours are more beneficial than others. Blue light, for instance, is known for its calming effects and can reduce stress. It is often linked to feelings of tranquility and serenity.
However, the brain associates blue light with daytime, which can be problematic at night. Blue light triggers wake hormones instead of sleep hormones, making it harder to fall asleep. This is because our internal clock, or circadian rhythm, uses light to let our brains know what time of day it is and whether we should be awake or asleep. Circadian rhythms are responsible for maintaining body temperature, hormone production, and our sleep-wake cycle.
To maintain a healthy circadian rhythm, we need bright light during the day and dim light at night. Blue light is rich in natural daylight, so it is beneficial during the day. At night, we should avoid blue light and opt for warmer colours like red, orange, or peach. Red light helps regulate melatonin production, which is crucial for sleep. It also helps our eyes adjust to the dark, making it easier to fall back asleep if we wake up. Sunrise alarm clocks mimic the sunrise, starting with soft red-tinted light that gradually turns into bright white light, signalling to our brains that it is time to wake up.
Therefore, while blue light is beneficial during the day, it is best to avoid it at night and opt for warmer colours that promote sleep.
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Frequently asked questions
Yes, red light helps regulate melatonin production, which is key to getting good sleep. Red light also helps your eyes adjust to the dark, making it easier to fall back asleep if you wake up during the night.
Blue light is known for its calming effect and can reduce stress. Green hues remind us of nature, helping to create a restful environment. Cool colours can lower heart rate and blood pressure, promoting better sleep.
Sunrise alarm clocks are a good option as they gradually brighten, mimicking the sunrise to help your body wake up naturally. They also often have sunset options to help you fall asleep.
Give yourself a tech curfew an hour before bed to help your brain wind down. Keep your bedroom a gadget-free zone and if you need an alarm, use a simple clock. If you use tech at night, switch on night modes to reduce blue light.
Keep your bedroom clutter-free, calm, and incorporate elements from nature. Pay attention to lighting and use soft, warm lights to wind down.


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