marc,
thanks for the input. I actually took the photo with the focus point in both places, both on the cube as well as the shadow. However, the photo with the cube in focus gave me a fuzzy shadow, which impinged upon the effect I was looking for. I liked the shadow play better than the cube and wanted the eye to move from the cube and rest on the shadow. Personal preference I guess.
Very good shadow play with the lighting! The little light cube in the big shadow is especially nice. May me the light reflections would be stronger on a bit darker background. MCsaba