If you're on Linux, Redshift is a good alternative to Flux. It's in Fedora and Ubuntu package managers - 'yum install redshift' or 'apt-get install redshift' re

If you're on Linux, Redshift is a good alternative to Flux. It's in Fedora and Ubuntu package managers - 'yum install redshift' or 'apt-get install redshift' respectively (if memory serves).