I'd say your plants are fairly healthy, although I agree with headshake...you probably need to transplant.

5000 lumens per sq. ft. is for flat surface area, not volume. So if you've got 17,000 lumens, you've got enough light to give a plant that is 3.4 sq. ft.--about a 22" x 22" space. That's enough a very good sized plant.

The problem with CFLs is that they aren't as good for bigger plants, since they don't have good canopy penetration. One thing you might want to consider is having about 3/4 of your lights on top, and 1/4 of them along the sides to promote budding. If, for instance, your plant is more like 18" x 18" (and I've had some 30-36" plants that were about that size), you can have 12,000 lumens on top, and 5,000 on the sides. That supplemental light under the canopy will help a lot.