How to Enable Night Light on Chrome OS

Night Light shifts your Chromebook’s screen colors to a warmer, amber tone, reducing blue light exposure in the evening. This can help lessen eye strain and may make it easier to fall asleep after late-night use. You can turn it on manually or schedule it to activate automatically from sunset to sunrise or at custom times. No special hardware or software is needed—the feature is built into Chrome OS.

What You’ll Need

A Chromebook, Chromebox, or Chromebase running Chrome OS (any recent version).
Access to the Quick Settings panel (click the clock or press Shift + Search + L).
If you want a schedule, make sure your device’s date and time settings are correct.

Step-by-Step

Open Quick Settings. Click on the clock in the bottom-right corner of your screen (or press Shift + Search + L). This opens the Quick Settings panel.
Find the Night Light icon. Look for a small crescent moon icon. It might be in the main grid of toggle buttons. If you don’t see it, click the pencil (or edit) icon to customize the panel and drag the Night Light toggle into the visible area.
Turn it on manually. Click the Night Light icon once. The screen will immediately shift to a warmer tint. Clicking again turns it off.
Open Settings for more options. To adjust the schedule or color temperature, right-click the Night Light icon (or click the arrow next to it) and select Settings. Alternatively, go to Settings > Device > Displays and find the Night Light section.
Choose a schedule. In the Night Light settings, you have three choices:
- Never: Night Light stays off until you manually turn it on.
- Sunset to sunrise: Chrome OS uses your location to determine when to automatically turn Night Light on and off. Make sure location services are enabled for this to work.
- Custom: Set your own start and end times. For example, you might set it from 9:00 PM to 6:00 AM.
Adjust the color temperature. Use the slider under Color temperature to make the tint more or less warm. Moving it to the left (toward the sun icon) gives a milder effect; moving it right (toward the moon icon) makes the screen more orange.
Test your settings. If you set a schedule, you can temporarily toggle Night Light on and off to see how it looks. The schedule will override manual changes at the set times.

Common Mistakes

Expecting Night Light to be in the main Settings menu. It’s under Device > Displays, not under “Personalization” or “Accessibility.”
Using the wrong icon. The Night Light icon is a crescent moon. Don’t confuse it with the “Do Not Disturb” icon (a circle with a line through it) or the “Battery saver” icon.
Forgetting to enable location services for “Sunset to sunrise.” If your Chromebook doesn’t know where you are, it can’t calculate sunset times. Go to Settings > Privacy and security > Location and make sure “Allow sites and apps to access your location” is on.
Setting a custom schedule that crosses midnight incorrectly. For example, setting “Start: 11:00 PM” and “End: 1:00 AM” works fine, but some users mistakenly set the end time as “12:00 AM” and then wonder why it doesn’t turn off. Use the 24-hour format if you’re unsure.

Tips

Use the keyboard shortcut. Press Shift + Search + L to toggle Night Light on or off without opening Quick Settings. This is the fastest way.
Create a custom schedule that matches your sleep routine. For most people, starting Night Light an hour or two before bedtime is ideal.
Combine with Dark Mode. Night Light changes color temperature, while Dark Mode changes the theme to darker colors. Using both can further reduce eye strain in low-light conditions.
Adjust the temperature gradually. If the warm tint seems too strong at first, start with a lower intensity (closer to the sun icon) and increase it over a few days.
Check your external monitor. Night Light applies to the built-in display and most external monitors. If you have a second monitor that doesn’t seem to change, check its own settings—some monitors have their own blue light filters that may override the system setting.

Troubleshooting

Night Light icon doesn’t appear in Quick Settings. First, click the pencil icon to edit the panel and check if it’s hidden. If it’s still not there, your Chromebook might be on an older version of Chrome OS. Update your system by going to Settings > About Chrome OS > Check for updates.
“Sunset to sunrise” doesn’t work. This usually means location services are off. Go to Settings > Privacy and security > Location and turn on location access. Also, make sure your time zone is set correctly in Settings > Advanced > Date and time.
Night Light turns on but the screen looks exactly the same. The color temperature slider might be set to the very left (minimal warmth). Move the slider toward the moon icon to see a more obvious change.
Custom schedule doesn’t activate. Double-check the times you entered. Chrome OS uses a 24-hour clock in some regions, so 9:00 PM is 21:00. Also, ensure you clicked “Save” or the setting applied (it usually applies immediately).
Night Light is on, but the screen is too orange. Reduce the color temperature intensity. If it’s still too strong, turn off Night Light and check if your display has its own color profile settings under Settings > Device > Displays.

Frequently Asked Questions

Does Night Light drain battery faster?

No, Night Light has a negligible effect on battery life. It simply adjusts the color output of the display; it doesn’t increase backlight brightness or processing power.

Can I schedule Night Light for specific days?

Chrome OS only allows a daily schedule (either sunset to sunrise or a fixed time range). You cannot set different times for weekdays and weekends.

Does Night Light affect the accuracy of colors for photo editing?

Yes, it will make colors appear warmer, which can affect color-critical work. You should turn it off when editing photos or videos.

Will Night Light work on a Chromebook with an external monitor?

Yes, it should apply to most external displays connected via HDMI or USB-C. If it doesn’t, check the monitor’s own settings for a blue light filter.

Is Night Light the same as Dark Mode?

No. Night Light changes the color temperature (warmth) of the screen, while Dark Mode changes the theme to use dark backgrounds. They are independent settings.

Can I use Night Light during the day?

Yes, you can manually turn it on at any time. Some people prefer a slightly warm tint even during the day to reduce eye strain.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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