You can conveniently setup a lamp and other lighting accessories at a particular height using the Foba ROBAO Long Pantograph coupled with a friction spring.It features a friction clamp that places the lighting equipment in the selected positionThis pantograph has adjustable hover load capacity ranging from 2.2 to 26.5 lbsWhen the load increases, then ROSAO or ROSAE counterbalance spring can be fixed for additional supportThe pantograph can be extended from 14.5" to 12.5' depending on your requirement