Some monitors and laptops incorporate light sensors which automatically adjust the brightness of the screen, with the objective of providing better vision and reduce power consumption .
F. Lux operates in a similar way, but the app does not actually detect the lighting level in your room; instead it depends on your current geographical location and the type of lighting (based on the time of day), the brightness and tint of your display. What this means is that, you have to provide two key information this include : “Indoor lighting” and “Your location”.
F.lux software automatically tracks the sun’s position(day or night) based on your city or latitude, and make the appropriate display adjustments.
On the first run I was horrified, my monitor looked almost looked like half burnt paper, I got to know my latitude using through f.lux: what’s my lat/long webpage, where I entered my location in the search box and it displayed the map along with the coordinates ,then I copied these coordinates and pasted it on ‘change location” window through F. Lux settings. For example the latitude of Chennai is “13.060416, 80.249634”.
Update: The latest version now automatically detects your location when your system is connected to the net, however you can manually change the location by entering your locality zip code or your preferred location latitude coordinates.
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 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 will set the screen monitor bright during the day and gradually dim it as evening approaches. At night, the screen will take a “halogen” tinge – an orange kind of hue. The lighting software will automatically adjust the color temperature of the computer monitor.
F.lux is not suitable for design work, there is an option that allows you to disable F.lux for 60 minutes, so you can get your work done in that amount of time, and then reactivate it. This is a freeware and supports Windows, Mac, Linux, iOS and Android operating systems.
Download F.Lux from the apps homepage.