NAME

       redshift - Set color temperature of display according to time of day.

SYNOPSIS

       redshift
        -l LAT:LON -t DAY:NIGHT [OPTIONS...]

DESCRIPTION

       redshift  adjusts the color temperature of your screen according to your surroundings. This may help your
       eyes hurt less if you are working in front of the screen at night.

       The color temperature is set according to the position of the sun. A different color temperature  is  set
       during  night  and daytime. During twilight and early morning, the color temperature transitions smoothly
       from night to daytime temperature to allow your eyes to slowly adapt.

OPTIONS

       -h     Display this help message

       -v     Verbose output

       -V     Show program version

       -b N   Screen brightness to apply (max is 1.0)

       -c FILE
              Load settings from specified configuration file

       -g R:G:B
              Additional gamma correction to apply

       -l LAT:LON
              Your current location

       -l PROVIDER
              Select provider for automatic location updates (Type `list' to see available providers)

       -m METHOD
              Method to use to set color temperature (Type `list' to see available methods)

       -o     One shot mode (do not continuously adjust color temperature)

       -O TEMP
              One shot manual mode (set color temperature)

       -x     Reset mode (remove adjustment from screen)

       -r     Disable temperature transitions

       -t DAY:NIGHT
              Color temperature to set at daytime/night

       The neutral temperature is 6500K. Using this value will not change the color temperature of the  display.
       Setting the color temperature to a value higher than this results in more blue light, and setting a lower
       value will result in more red light.

       Default values:

              Daytime temperature: 5500K Night temperature: 3700K

       Please report bugs to <https://bugs.launchpad.net/redshift>

SEE ALSO

       The full documentation for redshift is maintained as a Texinfo manual.  If the info and redshift programs
       are properly installed at your site, the command

              info redshift

       should give you access to the complete manual.

AUTHOR

       redshift was written by Martin Koelewijn and Jon Lund Steffensen.

       This  manual page was created by Franziska Lichtblau <rhalina@old-forest.org> for the Debian project (and
       may be used by others).

redshift 1.7                                        June 2012                                        REDSHIFT(1)