hi there
i have used this desk for over two years now at my college so know it inside out. hope my answers are of help to you.
yes you can control led lights, you attach them to a fixture just how you do for the intelligient lighitng you use.
yes you can you have to use a attribute called pallets. on a pallet you can programme gobo's, colour's, positions and intensity.
yes you can turn of the brightness without sending the fixture to home you simply put it to zero when it is in whichever position it is in. then the shutter will shut. to then re-use the brightness you simply scroll it up to the brightness you desire.
hope this helps
lucy