A Delphi program to shift the gamma intensity of your monitor down to reasonable levels via a command you can execute easily using task manager under Windows XP.  Just run it with the number between 1 and 255 to generate the level you desire. 

redshift32 200 ( will give you a brightness of 200 ) based on a program i found here although my version is in visual pascal.
You may need to elevate permissions by using the command this way psexec -i -s cmd.exe using from sysinternals then
cd "C:\Program Files (x86)\redshift-1.7-windows-i586"
redshift.exe -O 2300
Stephen P,
25 Apr 2015, 15:33