Could Your Light Environment Be Affecting Your Sleep in Perimenopause?

Sleep is one of the first things I look at when working with women experiencing changes in their hormones, energy or overall health. Yet, in my experience working with women over almost a decade, it’s also one of the most consistently overlooked foundations of wellbeing.

We tend to focus on what we're eating, which supplements we're taking and how much we're exercising. But how often do we stop to consider whether we're giving our bodies the right conditions to sleep well in the first place?

Our bodies are hard-wired to respond to light, but it’s so much more than just being asleep or awake. Light exposure has an overwhelmingly large part to play in our health and wellbeing, and has a particularly large role to play in hormone health.

Your body has a clock — and light helps set it

Our bodies operate on an internal timing system known as the circadian rhythm. This roughly 24-hour cycle helps coordinate when we feel alert or sleepy, alongside processes such as hormone release, body temperature and metabolism.

One of the most important signals for this internal clock is light.

Exposure to natural daylight, particularly in the morning, helps signal that it's time to be awake. As light levels fall in the evening, our bodies receive a cue that the day is winding down.

Light also influences melatonin, a hormone involved in signalling biological night and preparing the body for sleep. Bright light at the wrong time — particularly in the evening — can interfere with this timing.

The takeaway isn't that all blue light is bad. Light is essential for healthy circadian rhythms. The timing, intensity and duration of exposure matter.

Modern life can make this balance difficult. We spend much of our time indoors, sometimes in relatively dim daytime environments, before exposing ourselves to bright overhead lighting, televisions and screens late into the evening.

Our bodies don't necessarily get the clear distinction between day and night that they evolved to respond to.

Why this matters during perimenopause

Sleep can become more challenging during perimenopause for several reasons.

Fluctuating oestrogen/declining progesterone, hot flushes, night sweats, mood changes and other symptoms can interrupt sleep or make it harder to get enough restorative rest. Life demands and stress can add layers that are difficult to balance.

This is why I often start by looking at sleep when supporting people through hormonal changes. It isn't the answer to every symptom, but it's a foundational area that can influence how we feel and function, and support downstream events like ovulation.

Poor sleep can affect energy, concentration, mood and our capacity to cope with everyday stress. It can also influence appetite regulation and glucose metabolism.

And when you're already exhausted, finding the energy to exercise, prepare nourishing meals or maintain routines can feel considerably harder.

This doesn't mean that fixing your lighting will resolve perimenopause symptoms. It means that your sleep environment is one practical area worth exploring alongside the other factors influencing your health.

The connection between sleep, appetite and weight

If you've noticed changes in your appetite, cravings or body composition during perimenopause, sleep is worth considering as part of the bigger picture.

Research suggests that insufficient sleep can affect insulin sensitivity and appetite regulation. It may also influence food preferences, energy levels and how much movement we feel capable of managing.

Over time, these factors can contribute to the challenges some women experience with weight management and metabolic health.

Hormonal changes, ageing, muscle mass, nutrition, stress and physical activity also matter. Weight changes are multifactorial, and we shouldn't assume that poor sleep — or evening light exposure alone — is responsible.

Instead, I think it's useful to ask a broader question: Are the foundations supporting your health actually in place?

Sleep is one of them, and your light environment is one very important part of the sleep equation.

Five ways to support your body clock

1. Get outside in the morning.

Natural daylight, particularly early in the day helps provide a strong daytime signal to your circadian system. Where practical, spend some time outdoors after waking, even if it's simply having a tea outside or taking a short walk.

2. Keep your sleep and wake times reasonably consistent.

A regular schedule can help reinforce your body's internal timing. It doesn't have to be perfect, but large shifts between weekdays and weekends can make consistency harder.

3. Rethink your light environment

Switching to orange or red toned light in the bedroom can support melatonin production which is important for deep, restorative sleep. I recommend Block Blue Light for bedrooms and living spaces to support healthy sleep and circadian rhythm. If helpful, this link offers 15% off their products.

4. Be mindful of screens from late afternoon.

Reducing screen time in the evening and avoiding unnecessarily bright environments can help create a more sleep-supportive evening. Most phones and computers come with a warm light or ‘night shift’ setting which I recommend automating from late afternoon (let’s face it, most of us can’t avoid tech entirely- this makes it far more realistic!).

5. Make your bedroom a place for sleep.

Keep it as dark, quiet and comfortable as you can. If night sweats or hot flushes are disrupting your sleep, tweaking your sleep environment to lean more towards natural, breathable fibres, airflow and temperature support can be supportive, and personalised herbal/nutritional support can be a game-changer.

6. Check in with your GP.

Sleep Apnoea is something I’m always mindful of during the perimenopausal period, and there can be other reasons to speak with your doctor about disrupted sleep and persistent fatigue. Always work alongside your GP and communicate your concerns with them.

Start with the foundations

Finding where to start can be overwhelming.

Light, sleep, nutrition, movement and recovery all contribute to the broader picture of health. During perimenopause, paying attention to these foundations can help you make more informed decisions about the support you need.

You don't have to perfect every aspect of your routine. Start with one change, and remember that each step forward is a win.

If you’re looking for personalised support, book in with us today.

This article is for educational purposes only and is not a substitute for individual medical advice.