The blue light filter on Windows 10 is one of the easiest and fastest ways to... well, filter the harmful blue light emitted by screens. Discover how to activate it in a few simple steps.
How to activate the blue light filter?
On a Windows 10 computer
- Go to the Start menu at the bottom left
- Then Settings
- And finally System.
- You will then arrive at the Display section where you will activate the Night light option.
- Click then on Night light settings and select Turn on now if you wish to activate the blue light filter immediately.
Here you can also adjust the color temperature of this display by using the slider to have warmer or cooler colors.
⏱️ Note that you can schedule the activation of this filter according to the times of day by clicking on the Schedule night light button.
Then choose the times at which you want to activate this display.
In addition to this, if you activate the location settings of your PC, Windows 10 will automatically suggest schedules based on sunrise and sunset times.
Otherwise, you will have to set the activation times for the application yourself.
On Smartphone
Most of the time you will very easily find the night light settings in the general settings (often called night/dark mode). Note that some applications take this setting into account to change their own display as well.
More help here ==> activate the blue light filter on your smartphone.

Why activate night mode?
It reduces blue light emissions...
Indeed, your computer screen, on Windows 10 or otherwise, emits blue light, a portion of the spectrum of which (from 380 to 450 nanometers during the day and from 380 to 500 nanometers in the evening) has rather harmful consequences on your health and well-being: eye strain, visual disturbances, dry eyes, stinging, blurred vision...
Not to mention that blue light acts directly on the sleep hormone, melatonin, which can cause difficulty falling asleep!
... to preserve your eyes
In the evening, when the sun sets, but also during the day, your eyes are exposed to this blue light emitted by screens.
🛡️ Night mode therefore allows you to easily reduce some of the consequences of this light on your health, such as eye strain.
If you work or spend a lot of time in front of screens, and especially if you use them in the evening shortly before going to bed, then this Windows 10 feature will help you reduce the difficulties falling asleep linked to the secretion of melatonin (a hormone generated by your body when exposed to blue light, essential for waking up in the morning but more problematic when you are trying to sleep!)

Is this an effective solution?
Yes, the Windows 10 blue light filter helps to block some harmful blue light emissions at the source.
By activating it, you will be able to feel immediate effects on your sleep and on your reading comfort, especially after sunset.
This can also help you reduce eye strain and other annoyances linked to blue light and will preserve your eyes from many disorders.
Even so, the blue light will not be completely blocked: the filter will reduce the blue frequency but will not be able to prevent some blue rays from reaching your eye, that is the nature of LEDs.
In addition to this, artificial blue light is not only emitted by your computer screen but also by your TV, your smartphone, your tablet, and even sometimes by the lighting around you (notably LED bulbs).
Thus, if you wish to filter the harmful waves of this light as best as possible, the Night mode of Windows 10 (or your phone) will not be enough!
What are the alternatives?
Screen filters
Their effectiveness varies greatly depending on the brand, and we advise you to do your research before buying, while avoiding "entry-level" products which are often synonymous with poor quality.
Furthermore, it will sometimes be complicated to find ones that perfectly match the size of your screen.
Finally, they are very often relatively unsightly and you will instantly lose 100 coolness points by opting for this solution.
And here again, they do not filter the blue light emitted by your environment or by other screens (unless you equip every screen in your home with this type of product).
Not the ideal solution, then.
Blue light glasses
This type of glasses is increasingly used, especially by gamers, to counteract the undesirable effects of artificial blue light.
There are all kinds of them and, obviously, their effectiveness varies. But if you choose the right manufacturer, you will be assured of obtaining optimal filtration!

Depending on the brand and model chosen, the filtration rate of these blue light glasses can be very high.
At Horus X, for example, we offer gaming glasses with amber lenses that filter up to 86% of screen blue light.
🎮 This type of glasses, more commonly called "gaming glasses", is perfectly suited for intensive screen use and especially in the evening when the brightness is lower.
But if you want something more discreet, there are also blue light glasses with transparent lenses that allow you to very effectively filter the most harmful part of the blue light spectrum.
💻 Our screen glasses from the Nomade collection will prevent the side effects of this light while boosting your natural charm thanks to modern and elegant models.
As you will have understood, this type of glasses is today the most effective way to filter harmful blue light from screens in all circumstances: at the office or at home in front of the computer, in front of the TV, the tablet, or the smartphone.
They will follow you everywhere and have the huge advantage of focusing only on the harmful part of the light spectrum. Because yes, in blue light, there is also some good!
Windows 10 Blue Light Filter: The Final Word
If you spend more than 2 hours a day in front of a screen (Computer, TV, Smartphone, Tablet...), artificial blue light is likely already impacting your visual comfort, your sleep, and perhaps even your health!
The blue light filter offered by Windows 10 or by any other device is already a good solution to prevent these undesirable effects, but there are more complete solutions such as blue light glasses.
You can also combine solutions to ensure optimal protection by activating the night mode of your various devices and by using adapted screen glasses.
Filtering artificial blue light means taking care of your comfort and your sleep. Take action now!
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Comments
Merci pour cet article très instructif, je ne comprenais pas ma difficulté récente à m’endormir après de longues journées passées derrière mes écrans de travail. Vive le mode éclairage nocturne!