Including colors below the default allowed 1200k.
Why: So we can elimante green along with blue light as I'm doing here with 900k.
## adjust night time temp
defaults write org.herf.Flux lateColorTemp -int 900
## optionally adjust day time temp
defaults write org.herf.Flux dayColorTemp -int 900
Then quit and restart flux.
Open f.lux preferences. You'll notice the slider is 1200k, however the reported color will be 900k.