Last night, I curled up with a mug of herbal tea, my tablet glowing faintly beside me. I’d planned to scroll through a few wellness articles, but as I sat there, I realised how intimately aware I’ve become of my own energy rhythms. Some nights, I feel alert even under the glow of screens; other nights, I crave quiet, soft light, and early sleep.

This simple observation reminded me that while blue light’s impact on sleep is well-established in research, how we navigate it in real life is deeply personal. The science is clear, but the solution doesn’t have to be rigid. The key isn’t fear or perfection; it’s mindful awareness and gentle adaptation.

How does Blue Light Affect Sleep?

Blue light from screens suppresses melatonin production by up to 55% and delays sleep onset by approximately 1.5 hours.¹Chang, A.M., Aeschbach, D., Duffy, J.F. and Czeisler, C.A., 2015. Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences, 112(4), pp.1232-1237. It shifts circadian rhythms by about 3 hours compared to other light wavelengths.²Harvard Health Publishing, 2024. Blue light has a dark side. Available at: https://www.health.harvard.edu/staying-healthy/blue-light-has-a-dark-side [Accessed 23 October 2025]. However, individual sensitivity varies based on genetics, chronotype, and age.³Higuchi, S., Nagafuchi, Y., Lee, S.I. and Harada, T., 2017. An ancestral haplotype of the human PERIOD2 gene associates with reduced sensitivity to light-induced melatonin suppression. PLOS ONE, 12(6), p.e0178373.

The research on blue light and sleep is substantial and worth understanding:

Understanding the research doesn’t mean living in fear of screens. Instead, it invites us to create beautiful, intentional rituals that honor both evidence and lived experience.

1. Evening Screen Guidelines: The Two Hour Window

Research suggests that minimising bright screen exposure in the two hours before sleep supports natural melatonin release. Rather than seeing this as a restrictive rule, think of it as creating a liminal space between day and night.

Your Ritual:

• Dim overhead lights and switch to warm, amber-toned lamps
• If you must use devices, enable night mode or wear blue-light filtering glasses
• Consider this your “golden hour”, a sensory transition into rest

2. Morning Light Exposure: Your Circadian Anchor

One of the most powerful ways to support your circadian rhythm isn’t about what you avoid at night, it’s about what you welcome in the morning. Natural light exposure within the first hour of waking anchors your internal clock, making you more resilient to evening disruptions. ⁹NPR Life Kit, 2024. How to fall asleep: These daytime habits will help. Available at: https://www.npr.org/2019/03/20/705224359/do-this-today-to-sleep-well-tonight [Accessed 23 October 2025]. Studies show that office workers exposed to more light between 8am and noon fell asleep more quickly and slept more soundly than those with less light exposure.

Your Ritual:

• Open curtains immediately upon waking
• Enjoy your morning tea by a window or step outside for five minutes
• Let sunlight be your first “screen” of the day

3. Creating an Evening Wind-Down Ritual

Instead of scrolling before bed, create a sensory ritual that signals rest without rigidity.

Your Ritual:

• Brew a calming herbal blend—chamomile, lavender, or passionflower
• Journal, read a physical book, or simply sit in soft candlelight
• Let this be your body’s cue that the day is complete

4. How to Track Your Personal Blue Light Sensitivity

Some evenings, you may use screens closer to bedtime and sleep beautifully. Other nights, even brief exposure might leave you wired. Pay attention. Notice patterns. The research gives you the framework; your body gives you the specifics.

Your Practice:

• Keep a gentle sleep journal, note screen use, sleep quality, and how you feel
• Experiment with your personal “curfew” time
• Adjust based on what you observe, not what you “should” do

5. Do Blue Light Glasses Actually Work?

Consider blue-light blocking glasses, research shows participants wearing these for two weeks experienced a 58% increase in melatonin levels and improved sleep.¹⁰Ostrin, L.A., Abbott, K.S. and Queener, H.M., 2017. Attenuation of short wavelengths alters sleep and the ipRGC pupil response. Ophthalmic & Physiological Optics, 37(4), pp.440-450. They are particularly effective when:

• You work night shifts
• Screen time before bed is unavoidable
• You’re particularly sensitive to light
• Combine with other evening light practices

A Gentle Reminder

Blue light isn’t something to fear—it’s simply a biological signal your body recognises The research is clear: it suppresses melatonin and can disrupt sleep, particularly with prolonged exposure close to bedtime. But within that evidence, there’s room for nuance, self-knowledge, and gentle adaptation.

Wellness isn’t about rigid avoidance or anxious perfection. It’s about understanding the science, observing your own patterns, and creating rituals that feel both luxurious and restorative. Some nights you’ll choose the glow of a screen; other nights, you’ll crave candlelight and quiet. Both are valid when chosen with intention.