Staring at a bright, cool-toned monitor late into the evening can severely disrupt your circadian rhythm. Medical professionals and sleep researchers widely agree that exposure to blue light before bed suppresses melatonin production, making it significantly harder to fall asleep. Fortunately, you do not need to buy expensive blue-light-blocking glasses. Learning how to configure the Night light in Windows 11 allows you to automatically adjust your screen’s colour temperature based on the time of day.
In this health and productivity guide, we will show you exactly how to enable the blue light filter and schedule it to align with your local sunset, ensuring your late-night work sessions do not ruin your sleep schedule.
How to Turn on Night Light Manually
If you want immediate relief from a glaringly bright monitor, you can toggle the blue light filter on with just a few clicks.
- Click the Start button on your taskbar and select the Settings gear icon (or press Windows Key + I).
- In the left-hand menu, ensure System is selected.
- Click on Display in the main panel.
- Under the “Brightness & colour” section, you will see a toggle switch for Night light.
- Switch it to On.
You should immediately notice your screen taking on a warmer, slightly orange or amber hue. This warmer colour profile is significantly easier on your eyes in a dimly lit room.
How to Adjust the Colour Temperature
The default warmth setting might be too intense (making white backgrounds look deeply orange) or not intense enough. You can easily customise this.
- Still in the Display settings, click anywhere on the Night light text or the arrow next to the toggle switch to open the advanced menu.
- Locate the Strength slider.
- Click and drag the slider to the left for a cooler, less noticeable effect, or to the right for a warmer, deeper amber hue.
Pro Tip: Graphic designers and video editors should disable Night light when doing colour-critical work, as it intentionally distorts colour accuracy.
How to Schedule Night Light Automatically
The most effective way to use this feature is to let Windows manage it for you, slowly shifting the colour temperature as the sun goes down.
- In the advanced Night light menu, toggle the Schedule night light switch to On.
- You have two scheduling options:
- Sunset to sunrise: (Recommended) This uses your computer’s location services to determine exactly when the sun sets and rises in your specific city, adjusting the screen automatically.
- Set hours: If you work unusual shifts, you can manually input the exact time you want the filter to turn on (e.g., 9:00 PM) and off (e.g., 7:00 AM).
Frequently Asked Questions
Why is the “Sunset to sunrise” option greyed out?
This happens if Windows Location Services are disabled. To fix it, go to Settings > Privacy & security > Location, and ensure “Location services” is turned on. Windows needs to know your general timezone to calculate the correct solar schedule.
Is Night light available in Windows 10?
Yes. The feature exists in Windows 10 and can be found by navigating to Settings > System > Display. The setup process is almost identical to Windows 11.
By taking two minutes to configure this built-in wellness feature, you can significantly reduce digital eye strain and improve your overall sleep hygiene.
