People who are texting on their computers in nights may have abserved that blue light glow but during the daytime screen looks normal rises like a sun.it could suffer user hard to get into sleep
Flux is an automated program which adjusts you screen light and color according to your time.It adjusts normal in the daylight and warm in the night time. This feature works with your time displayed in your system. This program is designed to reduce your eye strain during nighttime.
According to Wikipedia This program is developed by micheal Herf(Picasa Programmer). No need to operate anything,it is automated once after installation run on startup. Flux is available for windows,MacOS,Linux and ipad/iphone
Flux Homepage