Why Night Light Isn't Working on Windows 10 and How to Fix It

The Night Light feature in Windows 10 is designed to reduce blue light from your screen, making it easier on your eyes at night. However, sometimes it may not work as expected. Here are some common reasons why Night Light might not function properly and steps to resolve the issue.

1. Check Night Light Timing Settings

In Windows 10, Night Light can be set to turn on and off automatically based on the time of day. Make sure the timing settings align with your needs:

• Go to Settings and select System > Display.
• Choose Night Light and review the start and end times.
• If the timing is incorrect, adjust it to your preferred schedule.

2. Update Graphics Drivers

Sometimes, outdated graphics drivers can cause issues with Night Light. To update them:

• Right-click on Start and select Device Manager.
• Expand the Display adapters section, right-click on your graphics card, and select Update driver.
• Choose automatic update search and install any available updates.

3. Restart Your Computer

A simple reboot can sometimes solve the issue, as it refreshes system settings. Try restarting your computer and check if Night Light starts working.

4. Check for Windows Updates

Windows updates often contain fixes for various issues, including Night Light functionality. Ensure your system is up to date:

• Go to Settings > Update & Security > Windows Update.
• Click Check for updates and install any available updates.

5. Reset Night Light Settings

Sometimes resetting Night Light can help resolve issues:

• Open Settings and go to System > Display.
• Toggle Night Light off, then turn it back on.

6. Use PowerShell to Restore Functionality

If Night Light still isn’t working, try restoring it using PowerShell:

Get-WmiObject -Namespace root\wmi -Class WmiMonitorBrightnessMethods | ForEach-Object { $_.WmiSetBrightness(1,50) }

Run PowerShell as an administrator, enter the command, and press Enter.