Now check the Action Center or the Settings on your Windows 10 Fall Creators Update to see if the night light feature is available. Toggle the switch under the Location service to ON. Toggle the switch under the Location for this device to ON. Click the Change button under the Location for this device. On the left side, choose the Location tab. Use Windows shortcut keys Win + i to open Settings.
If you find the night light in the Action Center or the Settings is greyed out after the Windows 10 Fall Creators Update, you can fix it with the steps below:
Reset Night Light-related Settings on Windows 10 Fall Creators Update
