My configuration file for Redshift. Place it in ~/.config/ Drag redshift onto the Startup Applications menu to have it boot on start

redshift.conf

; Global settings
[redshift]
temp-day=6500K
temp-night=5000
transition=1
;gamma=0.8:0.7:0.8
gamma=1.000:1.000:1.000
location-provider=geoclue
;location-provider=manual
adjustment-method=vidmode
;brightness=1.0:0.5

; The location provider and adjustment method settings
; are in their own sections.
; This is an example lat long for Portland, OR
[manual]
lat=45.53068
lon=-122.68317

; In this example screen 1 is adjusted by vidmode. Note
; that the numbering starts from 0, so this is actually
; the second screen.
;[vidmode]
;screen=1

Here is another config file:

[redshift]
temp-day=5800 
temp-night=3500
brightness-day=1
brightness-night=0.72
dawn-time=5:00-6:00
dusk-time=19:30-20:00
gamma=0.750:0.750:0.750
transition=1
adjustment-method=randr
location-provider=manual
[manual]
lat=%yourLocation%
lon=%yourLocation%

thx after many attempts it works eventually

Should be noted this gist is ancient at this point. Glad there is still useful info though.

bcomnes, thank you very much for your post here. It worked like a charm for me after I entered my proper lat and long info. Take care and thanks a million. THanks to you, I will sleep better tonight having been shielded from the short wavelength light this evening! Cheers! Pete.