The other day I was watching music videos and I noticed one for a popular rock band that was shot at a live show. The rig was 98% movers. Over the course of the song the pan and tilt changed twice but it was a move while dark. Color changes but no gobos were used. I can think of four or five reasons why the LD might have picked a truss of movers over a double hung truss of source fours with color changers, what might they be.