I apologize for not posting any sooner, but things do come and I have been spending time sorting out the problems with this particular scene.  I am bringing this post up in the forum list to shed some light (no pun intended) on the best approach to illuminate this set.  The following link will explain most of my workflow decisions, and may help others modify theirs to attain better results.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2860523

Illustrations to follow.