And from the little I played with lights on my loop, InnerCone and OutterCone describes the top and bottom of a cone. Inner would be the small, upper part and Outter would be the large, bottom part of the cone created by the light. There's also a length setting but it's been a while since I messed with em and don't remember. I'd have to experiment more. Sorry.
I got the InnerCone figured out and documented. It's not quite how you describe, but it all makes perfect sense now.