❔ If you have questions or issues, please refer to the wiki. LightBulb has minimal impact on performance and offers many customization options. 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 is an application that reduces eyestrain produced by staring at a computer screen when working late hours.Īs 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. It doesn't offer as much control over color temp adjustments, but if you're okay with that, this is worth considering.Development of this project is entirely funded by the community.

It's fast and lightweight, offers virtually the same set of features and options, and is equally intuitive to use, as well. A great alternativeĪll in all, if you're looking for a free and open-source alternative to F.lux, LightBulb might just fit the bill. One thing that needs more work, though, is more granular control over the color temperature adjustment slider-something that F.lux still does better. Use global hotkeys to change settings on the fly and even whitelist certain applications that require color accuracy. While the program will automatically detect your location and adjust gamma levels accordingly, you can still opt to manually set a location of your choice. You can even view a preview to see how this will transpire over a 24-hour period so you can tweak it to your preference. The third slider is for setting the duration at which one will transition to the other. Once installed, you enable and configure it from your system tray.Īccess LightBulb's configuration options, and it will provide you with three main sliders to you can use to adjust color temperatures for both daytime and nighttime. It works in a similar way in that it is able to adjust the gamma levels of your screen dynamically based on your geolocation and time of day. If you've used the latter before, the former will provide a familiar user experience. LightBulb is essentially a free and open-source alternative to the ever-popular blue light filter tool, F.lux.

Download LightBulb 2.4.6 free