I just ran in to this problem as well. I called in and support told me to shoot a cross section/elevation, then use a 3d moulding polyline, draw above where you want it apply the moulding you want then drop it in place. It worked for me, good luck!
I have looked through the library and cannot find a pool table light. Does anyone know if there is a pool table light somewhere in the 3D library?
Thanks!