You really need a combination of lights to do the trick. I agree that multiple rows of flourecent lights are required. In the past, I have used a double row of flourecent tubes over each car bay, plus a double row down each side of the garage (pointing outward), hung 8-12" down from the ceiling. Be sure to get flourecent lights with a good defuser. Don't run an open bulb. A good defuser will hel to eliminate the shadows.
Between the rows of flourecent tubes, I run tracks for track lighting and install the 2" halogen bulbs. This is "fill" lighting, and gives a more natural light source that's offsets the blue or pink lighting created by the flourecent tubes. The halogen tracks should be on a dimmer so you can adjust the light level. I also put the halogen lights over my work bench area.
If your garage is finished (drywalled), you can use plastic conduit tracks for the wire. If your garage is not finished, you need to thing about hanging drywall or you're wasting your time with the lighting. You need a bright white wall to help reflect the light.
Some people thing the lights should hang down from the ceiling, but I don't think it much matters unless you have a 12' or higher ceiling.
As long as you're wiring stuff, you might want to think about install a ceiling fan to keep your garage comfortable.
db