LightBulb is an application that reduces eyestrain produced by staring at a computer screen when working late hours.
As the day goes on, it continuously adjusts gamma, transitioning the display color temperature from cold blue in the afternoon to warm yellow during the night.
Its primary objective is to match the color of the screen to the light sources of your surrounding environment - typically, sunlight during the day and artificial light during the night.
LightBulb has minimal impact on performance and offers many customization options.
Publisher’s description
What is LightBulb?
LightBulb by Alexey 'Tyrrrz' Golub is open-source Windows software in the system utilities category. It ranks 42nd by popularity among system utilities in this catalogue. It is written in C#.
Installation and requirements
The publisher provides EXE (Inno Setup) installers for 64-bit, ARM64 and 32-bit Windows. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 2.7.2, released on September 10, 2026. The version history goes back to June 8, 2021: 22 releases, all linked to the official files. That is about 4.2 releases a year.
Popularity and file types
The Chocolatey package has been downloaded 11,732 times. The source code on GitHub (Tyrrrz/LightBulb) has 2,810 stars. Similar programs include AutoHotkey, Bazel and osquery.
Project description on GitHub: “Reduces eye strain by adjusting screen gamma based on the current time”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Documented silent install
- Updated in the last two months
Cons
- Installation needs administrator rights
In short: LightBulb is an open-source system utilitie tool for 64-bit, ARM64 and 32-bit PCs. It is actively maintained. Administrators can deploy it unattended.
Is LightBulb safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
11A887F1CB539B262EE6E72CC3572B93DACD091C447E36B5A2B2BDCDEE8AF364· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 22 versions ›22 versions over 5 years · about 4.2 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 2.7.2Latest | September 10, 2026 | — | 64-bit EXE (Inno Setup)ARM64 EXE (Inno Setup)32-bit EXE (Inno Setup) |
| 2.7.1 | May 19, 2026 | — | 64-bit EXE (Inno Setup)32-bit EXE (Inno Setup)ARM64 EXE (Inno Setup) |
| 2.6.3 | May 22, 2025 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup)32-bit EXE (Inno Setup) |
| 2.6.2 | March 28, 2025 | — | 32-bit EXE (Inno Setup)64-bit EXE (Inno Setup)ARM64 EXE (Inno Setup) |
| 2.6.1 | March 13, 2025 | — | ARM64 EXE (Inno Setup)32-bit EXE (Inno Setup)64-bit EXE (Inno Setup) |
| 2.6 | July 19, 2024 | — | 64-bit EXE (Inno Setup)ARM64 EXE (Inno Setup)32-bit EXE (Inno Setup) |
| 2.5.3 | June 6, 2024 | — | 64-bit EXE (Inno Setup)32-bit EXE (Inno Setup)ARM64 EXE (Inno Setup) |
| 2.5.2 | May 30, 2024 | — | ARM64 EXE (Inno Setup)32-bit EXE (Inno Setup)64-bit EXE (Inno Setup) |
Install from the command line
Silent install ›winget install --id Tyrrrz.LightBulb -echoco install lightbulb -yscoop install extras/lightbulbLightBulb-Installer.win-x64.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-Related guide: How to use winget: install and update apps
Information
- Publisher
- Alexey 'Tyrrrz' Golub
- Category
- System utilities
- Licence
- GNU General Public License Version 3
- Price
- Free
- Source code
- github.com/Tyrrrz/LightBulb
- Written in
- C#
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit
- Installer
- EXE (Inno Setup)
- Version
- 2.7.2
- Released
- September 10, 2026
- Added to the catalogue
- June 17, 2021
- Versions listed
- 22
- Updates / year
- 4.2
- Chocolatey downloads
- 11,732
- GitHub stars
- 2,810
- GitHub forks
- 173
- Website
- github.com
- winget ID
- Tyrrrz.LightBulb
- Chocolatey package
- lightbulb
- Scoop package
- extras/lightbulb
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is LightBulb free?
Yes. LightBulb is open-source software under the GNU General Public License Version 3 licence.
Is LightBulb safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install LightBulb with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can LightBulb be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does LightBulb run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of LightBulb?
The versions page lists all 22 versions with links to their official installer files, back to June 8, 2021.
What are alternatives to LightBulb?
AutoHotkey, Bazel, osquery, Simplenote and Hydrus Network. The alternatives page compares them.
