For those who haven't never heard of [f.lux][1] before, here's a brief description [via Wikipedia][2].

> f.lux is a cross-platform computer program that adjusts a display's
> color temperature according to location and time of day. The program
> was designed to reduce eye strain during night-time use and reduce
> disruption of sleep patterns.

I propose adding [tag:flux] as a synonym for [tag:f.lux]. While it's not a particularly popular tag, it does have a few questions. Intuitively, most people asking questions wouldn't think to try using the f.lux tag unless they specifically remembered the program's bizarre spelling.

  [1]: https://justgetflux.com/
  [2]: https://en.wikipedia.org/wiki/F.lux