LightBulb 2.7

LightBulb dims your screen, filters blue light, and reduces eye strain with customizable schedules for healthier viewing day and night.

Razvan Serea News Reporter Neowin · Mar 10, 2026 21:00 EDT with 0 comments

LightBulb

LightBulb is an application that reduces eyestrain produced by staring at a computer screen when working late hours. It has similar functionality to Windows 10 built-in "Night Light" feature, as well as to some other apps like F.lux but offers additional features and better customization. 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 — sunlight during the day and artificial light during the night. LightBulb has minimal impact on performance and offers many customization options.

LightBulb features:

Extensive customization options
Location-based sunrise and sunset times
Manual sunrise and sunset times
Whitelist for color-sensitive applications
Global hotkeys for adjusting on the fly
Smooth gamma transitions
Minimal performance impact
Works without internet connection

LightBulb 2.7 changelog:

Bump codecov/codecov-action from 5.4.2 to 5.4.3 in the actions group by @dependabot[bot] in #380
Bump CSharpier.MsBuild and 4 others by @dependabot[bot] in #381
Bump the nuget group with 9 updates by @dependabot[bot] in #390
Bump the nuget group with 3 updates by @dependabot[bot] in #391
Bump Microsoft.Extensions.DependencyInjection from 9.0.6 to 9.0.7 by @dependabot[bot] in #392
Bump FluentAssertions and xunit.runner.visualstudio by @dependabot[bot] in #393
Bump the actions group with 4 updates by @dependabot[bot] in #394
Bump the nuget group with 7 updates by @dependabot[bot] in #395
Bump the nuget group with 6 updates by @dependabot[bot] in #397
Bump the actions group with 2 updates by @dependabot[bot] in #396
Bump the nuget group with 8 updates by @dependabot[bot] in #402
Bump the nuget group with 6 updates by @dependabot[bot] in #407
Bump the actions group with 5 updates by @dependabot[bot] in #406
Bump the nuget group with 5 updates by @dependabot[bot] in #409
Bump the actions group with 2 updates by @dependabot[bot] in #408
Fix UWP apps not appearing in application whitelist by @Copilot in #412
Fix "Pause when fullscreen" incorrectly triggering on taskbar thumbnail hover by @Copilot in #411
Fix task switcher incorrectly triggering "Pause when fullscreen" on Windows 11 25H2 by @Copilot in #414
Fix fatal NullReferenceException in Avalonia dispatcher when fullscreen/whitelisted app is detected by @Copilot in #415
Migrate to Centralized NuGet Package Management (CPM) by @Copilot in #416
Align four minor code style inconsistencies with sibling repos by @Copilot in #417
Add localization support (English, Ukrainian, German, French, Spanish) by @Copilot in #420
Bump the nuget group with 8 updates by @dependabot[bot] in #422
Bump the actions group with 2 updates by @dependabot[bot] in #421
Ensure timely App disposal via exit handler and double-dispose guard by @Copilot in #423
Unload UI when hidden to tray to reduce passive CPU/RAM usage by @Copilot in #413
Add LIGHTBULB_SETTINGS_PATH environment variable override for settings file path by @Copilot in #424
Fix dwm.exe CPU usage when monitors are off by @Copilot in #419