Our project is following CI-2009 guidelines. What lighting controls would be sufficient for offices with open floor plans? Could a "cluster" (an "island") of 6 tables linked together be considered as one "workspace with individual controls". Would a dimmer that controls a few lamps hanging above that "island" satisfy LEED requirements? What is usually meant by "multiple mode" lighting control? Individual lamps for each table are too expensive for this project. Thank you.