Deer-lighting-05.jpg

In this image, The only light that is on is the can light set to spot, above the deer. The rest of the lights are off, the sun is set to 0.0 and the daytime backdrop intensity is set to 0.0. 

This creates a very dramatic light and gives you an idea how it reacts with the rest of your scene.

Note: the two shadows on the ceiling at the spotlight are from the reflective surface of the granite...they are the shadows of the deer and reflected light.