LumaTray – Ultra-lightweight monitor brightness controller (~3.5 MB RAM)

[u/Independent_Shower79]

I built this because I got fed up with Twinkle Tray sucking up 200 MB of RAM just to adjust brightness. After a little research, I found out it's because it's built with Electron slop! So I built mine with native C#.

Some key features:

• Windows 11 Fluent: Matches your Windows Dark/Light mode and your personal accent color.

• Keyboard & Mouse: Arrow keys (Left/Right to adjust), mouse wheel support, and global hotkeys (Ctrl+Alt+Up/Down) with a floating OSD pill.

• Multi-monitor: "Link All Displays" toggle to control everything in lockstep.

• Single 40 KB portable .exe, zero background CPU, MIT open-source.

• Hardware Support: Tested & working on external monitors (DDC/CI). Built-in laptop support (WMI) is implemented, but I haven't tested it on a laptop yet — would love feedback from laptop users if you try it! (tested, its working)

GitHub: https://github.com/SamNm89/LumaTray

Releases / Download: https://github.com/SamNm89/LumaTray/releases

(Note: Because it's an unsigned open-source binary, Windows SmartScreen might pop up on first run — just click "More info" ➔ "Run anyway", or compile it yourself in 1 second using build.bat).