Is there an electrical box mounted in the ceiling? What do you mean by "semi mount"?

He means semi flush, and if you do that a lot of the light will leak onto the ceiling first. So if the wood is dark, that is not so good if the wood is painted white, that will be great. Anything with 3 bulbs will give ample light, put it on a dimmer. That being said office lighting is task lighting and in this case that means a table lamp for reading and lighting up your work surface