What are some alternatives?
When comparing f.lux and LightBulb, you can also consider the following products
Cygwin - Cygwin is a set of tools that provide Linux and POSIX functionality to Windows.
SunsetScreen - Whether you're a morning lark or night owl, SunsetScreen allows you to set the time of the...
Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.
ImageOptim - Faster web pages and apps.
RedshiftGUI - RedshiftGUI changes the color temperature of your monitor to better match that of your surrounding.
Process Hacker - Process Hacker is a feature-packed tool for manipulating processes and services on your computer.