command to log out of LXDE directly

To log out of LXDE, I can click on the "Start" menu, click "Logout" and when the menu pops up click on "logout" again.

Or I can type lxde-logout in my terminal and when the menu opens, click on "logout".

Both options are too cumbersome. I need a command which will log me out immediately, without menu, or without other options.

Is this possible ?

I am using LXDE on Debian Wheezy