Being new to the rendering world I decided to experiment with bump mapping, I was not sure what the differances were when using different colors so I made this and just thought I would share it. It is self documented...
(http://content.screencast.com/users/Neilreed/folders/misc/media/5dc9e8e0-f02c-4abe-9e73-b06916ad2b57/bump%20test.52.jpg)