$ sudo apt-get update
$ sudo apt-get install kopete-plugin-thinklight 

kopete-plugin-thinklight is installed in your system.

Make ensure the kopete-plugin-thinklight package were installed using the commands given below,

$ sudo dpkg-query -l | grep kopete-plugin-thinklight *

You will get with kopete-plugin-thinklight package name, version, architecture and description in a table

kopete-plugin-thinklight package basic information: