[abrowne]

I used F.lux for a long time, but now prefer Redshift[1][2] on OS X and Linux. (I think it has Windows support too, although I haven't tried it.) F.lux seemed to use a lot of CPU considering what it was doing.

[1] Linux: try your package manager or <https://github.com/jonls/redshift/>

[2] OS X fork <https://github.com/geofft/redshift>