Lumen Alternatives
Lumen is described as '- magic auto brightness based on screen contents. You control Lumen simply by using your brightness keys - it'll automatically learn your preferences' and is a Screen Dimmer. There are more than 25 alternatives to Lumen for a variety of platforms, including Windows, Linux, Mac, Wayland and Android apps. The best Lumen alternative is f.lux, which is free. Other great apps like Lumen are Redshift, LightBulb, Dimmer and RedshiftGUI.
Alternatives list

EyeAway is a beautiful, privacy-first macOS app that helps reduce digital eye strain using the proven 20-20-20 rule. Every 20 minutes, look 20 feet away for 20 seconds - your eyes will thank you.
Cost / License
- Paid
- Proprietary
Platforms
- Mac


+1
Small GTK GUI application to set contrast, brightness and gamma for wayland compositors which support the wlr-gamma-control protocol extension. Basically this is the example from here: https://github.com/swaywm/wlroots/blob/master/examples/gamma-control.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Linux
- Wayland

Away From Keyboard is an app that reduces eye strain with reminders to take a break.
Cost / License
- Paid
- Proprietary
Platforms
- Mac














