With 24" monitors, it would look something like this(that's with the side displays angled at 45degree)
Unless you can stand having the monitors go beyond the edges of your desk, there isn't much that can be done with your config I'm afraid.
There is an alternative.
You could get wall mounts, and mount your screens to the wall instead of having them rest on the desk.
With 3 screens, you'll find your giant desk lamp to be redundant. The 3 screens will probably shed more light than the lamp and you'll find your-self tossing it away.