They make floor lamps that point up to the ceiling and reflect light off of it... I personally like those the best. They're inexpensive and usually have 3 settings.
On that same token, if you opt for these kinds of lights, it's best to place them in a room with brightly colored walls that wont absorb the light, and you'll only end up wasting money both on the lights, and on your energy bills just trying to keep your office bright.
Otherwise, they are awesome fixtures.