lumen ☆

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Description:
Magic auto brightness based on screen contents

Type: Cask | Latest Version: 1.3.0@0 | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: System utilities

Tags: macos brightness automation display utility

Install: brew install --cask lumen

About:
Lumen is a smart utility for macOS that automatically adjusts screen brightness based on the content being displayed. It analyzes the luminance of your current window to determine the optimal brightness level, reducing eye strain. This provides a more natural viewing experience compared to the standard ambient light sensor.

Key Features:

Content-aware brightness adjustment
Works independently of ambient light sensor
Lightweight and low system resource usage
Simple background operation

Use Cases:

Working in environments with inconsistent lighting
Reducing eye strain during long coding or writing sessions
Automating display adjustments for creative work

Alternatives:

f.lux – f.lux adjusts color temperature (blue light), while Lumen adjusts brightness based on screen content.
Brightness Slider – Brightness Slider offers manual control, whereas Lumen provides full automation.

Version History

Detected	Version	Rev	Change	Commit
Sep 2, 2025 8:15pm	1.3.0	0	VERSION_BUMP	6bfe7196
Aug 5, 2025 2:20pm	1.3.0	0	VERSION_BUMP	9cfcbacd