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Editors' Review · November 4, 2025

Gamma adjustment utility for PC

LightBulb is a free utility tool that was created by indie dev Alexey Golub for PC. This open-source software can be used to dynamically adjust gamma levels being displayed by monitors. It does so based on the time of day as it transitions from morning to afternoon, and night.

LightBulb utilizes a similar concept to F.lux or CareUEyes in that it attempts to reduce eye strain by changing the color temperature of computer monitors from the cool blueish shade to a warmer and more relaxing orange color. It's easy to set up and boasts a simple and intuitive user interface.

Enlarged image for LightBulb
LightBulb 0/1

Technical

Title
LightBulb 2.6.3 for Windows
Requirements
Windows 11
License
Free
Latest update
Author
Alexey Golub
SHA-1
b577bf744aa6ea96bedb04bdf38c35c36cb4cd00
Filename
2.6.3.exe

Program available in other languages



Changelog

We don’t have any change log information yet for version 2.6.3 of LightBulb. Sometimes publishers take a little while to make this information available, so please check back in a few days to see if it has been updated.

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