To avoid being blinded by a bright screen at night, f.lux is free software that makes the color of your computer's display adapt to the time of day automatically: warm at night and like sunlight during the day.
1. Go to F.lux and click on Download F.lux.
2. Open the installer in your Downloads folder then click the F.lux icon.
3. Click Open and Move to Applications Folder. Set your preferences (waking hours, location, color intensity, etc) and click Done.
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