I'll just briefly explain to you the function used: Note: no information is sent to me, the calculation is done entirely locally, on your computer. To that end I've written a simple simulator, and for even more detail below that there is a spread sheet, if you want the extra detail then un-hide it:. We'll use a more eloquent way of working this out, but first lets just brute force it. It doesn't offer as much control over color temp adjustments, but if you're okay with that, this is worth considering.Before reading the answer can I interest you in a clue? 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.
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