Thank you Ockham.  I thought of that, but wasn't sure what lines to delete.  Now I know.  In the meantime, what I just finished doing was renaming the problematic light so that it wouldn't conflict with the names of the ones for the newly added lights, and it seems to work, as the scene renders now.

Intel Core I7 3090K 4.5 GhZ (overclocked) 12-meg cache CPU, 32 Gig DDR3 memory, GeoForce GTX680 2gig 256 Bit PCI Express 3.0 graphic card, 3 Western Difgital 7200 rpm 1 Tb SATA Hard Drives