Why Blue Light Is Catastrophic for Your Sleep
Did you know that blue light can effect your sleep quality?
If it’s not something you are across, consider It’s something we are becoming more and aware of considering the broad consequences associated with its use.
If you’re like many, watching TV or using your phone/laptop before going to sleep is common place.
And we do this without realizing the effect blue light emitting screens can have on our physiology – particularly when it’s time to fall asleep.
It may be time to reconsider.
What is Blue Light?
Blue light is a colour of visible light detectable by the human eye. Its wavelength is one of the shortest on the electromagnetic spectrum making it one of the most intense.
What Emits Blue Light?
The following are a list of common sources of blue light:
- The Sun
- Fluorescent Lighting
- LED Lighting
Is Blue Light Bad?
Blue light is not necessarily bad for you on its own – it is a normal part of our vibrant colour spectrum. However the rise of technology has dramatically increased our exposure once the sun disappears.
Research indicates it has a terrible influence on our sleep hygiene. It plays havoc with the production of one of our body’s important sleep hormones, Melatonin.
What is Melatonin?
Melatonin is a hormone produced by the Pineal Gland as the sun goes down. Its main role is to prepare our body for sleep. Similarly, Melatonin production reduces as light starts to filter through again in the morning, letting us know it’s time to wake.Blue light emitted from our screens can reduce production of Melatonin, an important hormone for sleep.Click To Tweet
This sleep/wake cycle is often known as our Circadian Rhythm.
Why is Blue Light Bad For Sleep?
Blue light’s suppression of Melatonin production toys with your body’s preparedness for sleep.
Night time exposure basically tells your body it’s not time to do the one thing you’re supposed to be doing. You may still sleep your usual hours but the quality can be compromised.Each hour of exposure to blue light suppresses melatonin for approximately 30 minutes.Click To Tweet
Furthermore, he suggests that going to bed without normal melatonin production results in “devastatingly poor sleep cycles, and not being able to fully rejuvenate your brain and body.”Going to bed with reduced melatonin production results in devastatingly poor sleep cycles, poor rejuvenation of brain and body.Click To Tweet
Staggeringly, Shawn also mentions that Melatonin disruption has broader ramifications than just sleep. Suppressed Melatonin “disrupts the normal function of virtually ALL other hormones in your body. Hormones related to weight management, digestive function, and immune system function.”Suppressed Melatonin also disrupts the normal function of virtually ALL other hormones in your body. Hormones related to weight management, digestive function, and immune system function.Click To Tweet
It also comes with an “increased risk of cancer, obesity, gut dysbiosis, diabetes, and more.”
So as you can see, something as simple as prolonged screen time can do far more than just make your eyes tired. Blue light may have broader health consequences as well.
How Can You Protect Against Blue Light
The obvious one is to try and reduce your night time exposure where possible.
Our habits and preferences can make this tricky, but do your best to get off the tech immediately before going to bed. At the very least get that technology out of your bedroom.
Secondly, consider equipping a blue light filter to your phone, tablet, laptop and computer.
Blue Light Filters
Most smartphones have an in-built filter you can equip.
Android phones have a specific drop down feature you can enable and Apple uses something called Night Shift.
If you’re looking for a blue light filter for a laptop or desktop, consider using a program called f.lux. It’s quite handy and easy to use.
There are also some fantastic blue light filter apps you can download for your phone.
I’m personally using the Twilight app on my Android and find it very useful.
Here is a screenshot of how my phone looks with the filter equipped. There isn’t generally a huge change in colour but it does tend to look a little more red.
The idea with many of these filters is to start removing blue light as the sun goes down. Just like nature does. You can usually set a pre-determined timeframe for filtering, but most just go off daylight charts.
Most blue light filters are pretty functional and can be a paused for times when you need to see accurate colours. This can be a little annoying if you are designing, gaming, taking screenshots etc. But the benefits far outweigh any inconvenience on this one.
Switch Your Light Globes
Another simple option is to try and replace any LED or fluorescent lights with warmer alternatives. Similarly, turn them off where possible.
Blue Light Glasses
Much like 3D glasses, you may find your options a little limited if you genuinely need a prescription. But if you know what you need you can hunt around and find something suitable.
This is just another example of how the modern world may leave a subtle, yet potentially nasty legacy on our health and well-being. For more, consider checking out other physical signs the modern world is taking a toll on your body.
But for now, focus on reducing your nightly exposure to blue light. You may be pleasantly surprised at how powerful this simple idea can be.
Enjoy a better night sleep on us, you deserve it.
Have you taken any steps to reduce your exposure to blue light? If so what would you recommend?
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