No crown molding there. The soffit was actually framed out that way:
The black lines represent the framing. We used 1X2 lumber for the soffits. It's a 3 piece design that mimics what crown would do. The red lines show how the drywall was attached, and the blue is the LED lighting. I don't have a picture available, but there is a conduit installed in the column next to the riser. A transformer and outlet are inside the column. Power is then routed through the conduit, up the column, and out the soffit. I believe the rope light is a total of 2 pieces.
Let me know if you'd like a closeup shot of the soffit. That might make it a little easier to see as well.