F.lux is a great tool for anyone who needs to adjust the color temperature of their display to match the lighting conditions of their environment. It's easy to set up, and you can customize it to your exact geographical location, so you get the best possible colors for your region. The different modes available also make it easy to adjust the brightness of your desktop, from Candle to Halogen. Highly recommended!
Download of F.lux 4.124 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The latest version of the program is supported on PCs running Windows XP/XP Professional/Vista/7/8/10/11, 32-bit.
The program's installer files are generally known as flux.exe, Flux_4.0.0.exe or PhotoStream.exe etc. F.lux lies within System Utilities, more precisely Automation. We recommend checking the downloaded files with any free antivirus. The following versions: 4.118, 4.8 and 4.7 are the most frequently downloaded ones by the program users. This program was originally developed by F.lux Software LLC.
From the developer:
Ever notice how people texting at night have that eerie blue glow?
Or wake up ready to write down the Next Great Idea, and get blinded by your computer screen?
During the day, computer screens look good—they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at the sun.
You may want to check out more software, such as u::Lux Config, Lux or Trapcode Lux, which might be related to F.lux.