I am such a fan of this shadowy split lighting technique. I really think it brings an element of drama because of the stark contrast and harsh shadows.
Aslo working with different lighting, here's a monochramtic shot, which three levels of lighting. My aim for this was to have gold be the focus, and I wanted to convey vintage casino or party vibes.
UNDER EXPOSED
PROPERLY EXPOSED
OVER EXPOSED
Here's what the setup looked like for my monochromatic still shot