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REDSHIFT:(1)			 User Commands			  REDSHIFT:(1)

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 continously 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

EXAMPLE
       Example for Copenhagen, Denmark:

	      $ redshift -l 55.7:12.6 -t 5700:3600 -g 0.8 -m vidmode -v

AUTHOR
       redshift was written by Jon Lund Steffensen <jonlst@gmail.com>.

       Both redshift and this manual page are released under the  GNU  General
       Public License, version 3.

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

KNOWN ISSUES
       Redshift	 won’t	affect	the  color  of	your cursor when your graphics
       driver is configured to use hardware  cursors.  Some  graphics  drivers
       have an option to disable hardware cursors in xorg.conf.

redshift			  August 2010			  REDSHIFT:(1)

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