This is the study I did in the workshop today. While working on it, I was telling someone I thought my lights were to light. She disagreed, she thought I was keep everything way too dark. She said I needed to put my lightest light in to get my relationships right. So I did and after dropping in the light I could see that everything was way too dark. She was right.
Its very cool that such a simple task helps out so much. I spent the rest of the time reworking the lights, it looks much better than it did.