A typical old fashioned Circline fluorescent fixture with 22 and 32 watt T9 lamps will produce something close to 4000 lumens. Match that, and you should have general illumination roughly equivalent to what you have now. You might have to better it some, though, as the fixtures' globes will absorb some of the light. A 23-27 watt CF retrofit will produce 1600-1900 lumens. Three of them will produce about 35% more light than you have now. I'd think that, even with globes, three fixtures with 23-27 watt CFs would be ample.

DH is not in town right now but I'll have him install the new perimeter pendants in Sept. and then I can make a photo. This photo doesn't tell the whole story but you can see the ceiling fixtures and the fluorescents. Excuse the mess--I'm trying to move stuff around in the new space. Be patient here. Will try to explain. Our new kitchen is a 12 x 17 bumpout running the long way along the front of our house along our old 8 x 10 kitchen plus basement access, which have now morphed into a corridor and an eating nook and a closet; wrapped along the perpendicular end of the old kitchen/corridor and new kitchen is a new lobby. The Lobby and the old kitchen are really passageways--besides accessing the G-shaped kitchen through the gap in the G, the corridor-lobby has access doors to garage, front step, basement, dining room, kitchen closet, and coat closet. Not easy to understand this, but if you dig through my Flickr stuff you'll see the plan. Essentially, the halls make a T and the new kitchen cuddles into one side of the T and the dining room into the other side. So... We've put four matching 2-bulb Besa ceiling hugging fixtures along the T and two 3-bulb ones into the center of the kitchen. That means that we bought a total of 6 fixtures that all match, in order to try to homogenize the disparate parts. We'll also have matching white Quoizel pendants along the two parallel walls in the kitchen that run same direction as the stem of the T. (see a new post I made today). Are you using CFL's that were specifically designed for dimming? They ARE in the stores but I haven't tried them yet. Interesting that your kitchen code requires CFLs! I thought our community was restrictive but don't recall this requirement. The community does allow recessed cans in attics, but we chose not to do this because of energy and ice dam concerns. We are not allowed to put anything but fluorescents into closets. I have a young friend who has a 1950s kitchen that was always progressive and functional. She retained the ceiling fixture position when updating the space. She put in a large ceiling-mounted 1-foot hanging xenon? hallogen? something else? very bright mod light on her white ceiling which she feels is very sufficient for most kitchen activities. There is a light over the sink and another over the table and there is one in the range hood, but otherwise, I think that's it. She's 15 years behind me in the aging issues. Kitchen has a wall of windows. Please let us know how things progress in your project. Inquiring minds want to know. Here is a link that might be useful: note two ceiling lights and undercab fluorescents in partly finished kitchen

@jessicabaskerville, Given the extra ceiling height, your open area plan, and overall island size I suggest using 3 pendants of the size you're currently considering. See attached image for approximate layout. Keep the height so anyone standing at the island can see through to other spaces un-obstructed by the base of the pendants. The island pendants should be on a separate dimmer for better overall control of kitchen lighting. Also, be careful of your bulb choice since bare bulbs will produce some glare (another reason to use a separate dimmer). Please post pics when your project is completed.

I think the size of your island is too small to support three pendants. You could possibly do one or two. dining light fixture optional. I don't really think it will look bad if you had three separate hanging fixtures either, but it is a matter of preference. I personally like when different functional spaces are demarcated by different focal points. Layered lights (recessed + pendants + sconces + ambient wall lights) gives better results IMO but if your space is smaller you can opt to keep it simple. At 10 feet you will likely need a task light over the island. There are some very minimalist linear suspension LED task lights that might do the trick.