You are exactly right about using the corkscrew type bulbs. The 6500k bulbs (full sun) work great for supplemental lighting, are inexpensive, and really add bulk to your plants. You can use any type of mount. The easiest way to mount them is by buying a hooded shop light, an extension, and 3 Y adapters. That allows you to mount 4 bulbs into a small area and will really up your bud production. It's also considerably less of a hassle to assemble (and much less expensive) than a HPS. I flower under HPS with lots of CFL supplemental lights.
I veg and keep my mama plants under the exact same setup as I'm describing and it produces plenty for me.
I flowered a plant under 4 CFL's and pulled a couple of ounces off the plant.
Good luck!