yep cfl's run along the same lines, you can get them much closer to the plants so they dont loose as much of there light intensity values. for every foot your light is away from the plant light intensity is cute by 50%, and with the heat generated by the high power HID lights you need them far enough away they dont burn the plants.
i have one that was vegged under my 400w HPS and its a tall skinny plant, i have six under cfl and they are very short and bushy.