I believe most if not all of the computer users will use their computer (Facebook-ing, Messaging etc.) during the night time, and possibly until the very late night. And during the usage, you might not feel tired (Of course, who want to stop when you going to kill the boss in Mafia War?), but your eyes tell you that they are tired. Why? Most likely it is due to the inappropriate display temperature of your LCD/monitor, which makes your eyes feel tired after an hour or so of computer usage. This is because at daytime, the screen brightness/colour temperature has no problem for your eyes due to the adequate of lights, but when turned to nighttime, sunset happened, the same screen doesn’t work too well for your eyes anymore because you are now rely on the indoor light sources (Halogen, Fluorescent etc.), and the same screen tends to be too bright for you, thus stresses you eyes. Not only that, several studies shows that when an inappropriate display colour temperature exposed to a person’s eyes, he/she tend to have bad sleeping quality.
So What F.lux can do for you?
F.lux 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.
So I guess you have some idea what F.lux can do for you. Basically it change the display colour temperature to a warmer one during night time to make one’s eyes less tired and able to sleep better after the computing session. Check out the screenshot below:
Above is the main interface of F.lux. A very simple one showing your sunset/sunrise time, the display colour temperature (shown is 4200K at night time which is the temperature suited for Fluorescent), as well as your location latitude and longitude. When you click on the middle section (a sine graph like chart), it will execute a preview for you to see how the display colour temperature change across time. At the bottom of the interface, it allows you to disable it for one hour when you require to do some colour-sensitive work, eg. Photo editing, Colour matching etc.
Under Settings, you can adjust the display temperature that you preferred for daytime, and also for night time. Of course, for daytime it is always recommended to have the display temperature set at 6500K (Daylight), but for night time, it can be adjusted according to your light source in the room/place. If you think that the location F.lux detected is somewhat not accurate enough, you can always change it here. It will lead you to their website to look for the location latitude and longitude using Google map. As an extra option, you can change the transition speed between the daytime and the night time.
At the time of writing, I have F.lux turned on for my LCD. Since it is my first time using it, I would say it is quite hard to get used to it for the first time because everything seems dimmed, and a bit red-ish. But I do feel that my eyes doesn’t feel much tired compared to previous day, so I guess it really helps. During the startup of the software where the display colour temperature slowly changed, my computer seems laggy a little bit, but after the transition, everything back to normal. However, I do have an unstable moment with F.lux where the main interface doesn’t want to appear on screen even I call for it, probably it has some clash with my other software, but everything works fine after I restarted it. So, protect your eyes, get a good sleep after night time computing, and all of these can be done by installing F.lux.
You can download F.lux here.