Darker days and longer nights are here, but what does that mean for your sleep?
Our environment plays a huge part in our sleep quality, and with the nights drawing in and the temperature dropping, our sleep habits are as susceptible to change as the winter weather.
You might think that shorter days and longer nights present the optimum scenario for sleep, but there’s a hidden complexity to the way light – or a lack of light – impacts our sleep patterns.
We’re going to take a closer look at the fascinating relationship between light exposure to sleep, asking what the winter months really mean for your ability to get the rest you need.
The science of light and sleep
Our body clocks depend on light to function. Circadian rhythms rely on light not just for sleep-wake cycles, but for various other physiological processes, including mood and energy levels. Exposure to light – especially blue light emitted by screens and artificial lighting – can significantly influence melatonin production, otherwise known as the sleep hormone.
Winter’s reduced daylight hours can disrupt this delicate balance, as the lack of sufficient natural light during the day and the prolonged use of artificial light at night can misalign our circadian rhythms. This can lead to sleep disturbances.
Light and the winter blues
The lack of light that comes with winter impacts a lot more than just our sleep. Shorter winter days can also lead to low mood, often referred to as the ‘winter blues’. According to the NHS, around 2 million people in the UK suffer from Seasonal Affective Disorder (SAD), which is characterised by depressive symptoms and mood swings in winter.
These symptoms can indirectly impact your sleep. Reduced sunlight can result in lower serotonin levels, a neurotransmitter that impacts appetite, mood, and – crucially – sleep.
Managing light exposure during winter
There are several ways to protect yourself from the negative impacts of winter darkness, such as sticking to a regular sleep routine and watching your screen usage. Some of the best ways to mitigate poor sleep in winter include:
Maximising daylight exposure
Make an effort to expose yourself to natural light during the day. If you can’t go outside, try arranging your workspace near a window. This can help regulate your circadian rhythm.
Minding your screens
The blue light from screens can trick your brain into thinking it’s still daytime. Limit screen time at least an hour before bed and consider using blue light filters on your devices.
Dimming the lights
As bedtime approaches, dimming the lights can help signal to your body that it’s time to wind down. Opt for warmer light tones that are less disruptive to melatonin production.
Considering light therapy
For those severely affected by the lack of daylight, light therapy using a light box can be beneficial. It mimics natural outdoor light and can help improve mood and sleep.
Maintaining a consistent sleep schedule
Going to bed and waking up at the same time every day, even on weekends, helps stabilise your internal clock.
As we navigate through the darker days of winter, being mindful of our exposure to light can make a significant difference in our sleep quality and overall health.
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