f.lux™

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.

f.lux
f.lux fixes this: it makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.

It's even possible that you're staying up too late because of your computer. You could use f.lux because it makes you sleep better, or you could just use it just because it makes your computer look better.

f.lux makes your computer screen look like the room you're in, all the time. When the sun sets, it makes your computer look like your indoor lights. In the morning, it makes things look like sunlight again.
Tell f.lux what kind of lighting you have, and where you live. Then forget about it. f.lux will do the rest, automatically.

We're @herf and @lorna.
Tweets about f.lux

F.lux for Linux: indicator applet available
July 25, 2010

We're happy to announce a proper Linux f.lux GUI, along with a ton of bugfixes to the command-line app.
The indicator project was done by Kilian Valkhof (creator of trimage), and he's posted the indicator applet source here on github. The new package uses Gnome's AppIndicator, so it works on Ubuntu 10.04+. We'll post packages for other versions soon.
In order to ensure you get updates as they're posted, you should add Kilian's repository and install like this:
sudo add-apt-repository ppa:kilian/f.lux sudo apt-get update sudo apt-get install fluxgui

Here's how it looks!

xflux daemon (command line, but for X-Windows)