With a pulley. They make a special
base thats heavy for the lamp to use, it has a loop on it. Put some tie
line on that, through a pulley
system to wherever it gets operated from, and then take your cable, and attach it loosely to the tie
line at several points. have that go to a
dimmer. Now for a true overkill to the job, put the entire rig
dead hung on a
batten. Flying is easy then.