Fluorescents are great for economical general-purpose lighting, but they're just *AWFUL* for swirl-spotting, you'll only see the worst of the worst. Even "art gallery" fluorescents don't expose marring IME, they're just not the "point source illumination" that works best for that.
Check out the lights they use at gas stations (are they metal halide? sodium? :nixweiss I dunno for sure *what* they are.). I'd try to actually inspect a car under that lighting before spending a lot of money (on something that might not work too well). Otherwise, supplement the fluorescents with ceiling mounted incandescents (high wattage, ~300w)and free-standing halogens.
Whatever you go with, get more than you think you need, and more than lighting contractors tell you is sufficient. Remember that normal people have no idea what detailing is all about and usually can't see marring under *any* conditions.
FWIW, I have dozens of 8' fluorescent tubes in my shop, and incandescents mounted between the rows of fluorescents. I turn off the tubes and rely on the incandescents to inspect for marring.