Sets OS X display temperature using Flux. Requires Flux: http://justgetflux.com/ Inspired by Kelvin: http://apple.stackexchange.com/a/51589/1453 Be sure to check "Custom" as "Lighting at night" preference in Flux.

flux-temp

#!/bin/bash

# Sets OS X display temperature using Flux.
# Requires Flux: http://justgetflux.com/
# Inspired by Kelvin: http://apple.stackexchange.com/a/51589/1453
# Be sure to check "Custom" as "Lighting at night" preference in Flux.


declare l r d n night day

while getopts ":hlrd:n:" opt; do
  case $opt in
    l)
      defaults read org.herf.Flux
      exit 0
      ;;
    r)
      r=1
      ;;
    d)
      d=1
      day=$OPTARG
      ;;
    n)
      n=1
      night=$OPTARG
      ;;
    h)
      echo "flux-temp [-hlr] [-d temp] [-n temp] [temp]
-h	 shows this help
-l	 shows current Flux settings
-r	 kills Flux
-d temp	 sets day temperature
-n temp	 sets day temperature

Running flux-temp without options (e.g. flux-temp 3000) sets both night and day temperature; effectively setting the current display temperature no matter what time it is.
"
      exit 0
      ;;
    \?)
      "Invalid option: -$OPTARG" >&2
      exit 1
      ;;
    :)
      echo "Missing argument for -$OPTARG" >&2
      exit 1
      ;;
  esac
done

killall Flux > /dev/null 2>&1

[ ! -z "$r" ] && exit 0

[[ -z "$n" && -z "$d" && ! -z "$1" ]] && night=$1 && day=$1

[[ -z "$night" && -z "$day" ]] && echo "Provide a temperature between 2300 and 6500 (rounded to nearest 100)." && exit 1

[[ ! -z "$d" || ( -z "$d" && -z "$n" ) ]] && defaults write org.herf.Flux dayColorTemp -int "$day"
[[ ! -z "$n" || ( -z "$d" && -z "$n" ) ]] && defaults write org.herf.Flux nightColorTemp -int "$night" && defaults write org.herf.Flux customNightColorTemp -int "$night"

open /Applications/Flux.app
exit 0