Well, I can't say that I know how it happened, but I can say it is repaired and the car is on the road again.
Getting the burned-out fuse out of the light switch wasn't hard, but getting the new fuse in proved to be impossible...found out that it got much easier if I just took the entire switch out of the dash, didn't need to be disconnected from the wiring, just rotated so that the fuse location was easier to get some leverage on. The lights still would not work after the fuse was replaced in the light switch, and my S-O said something about maybe the other fuse was burned out so I checked. Sure enough, both fuses were burned out, the main 20 amp fuse at the fuse block and the glass tube 15 amp fuse on the light switch. I figure perhaps a power surge from the alternator, I don't know, but I have put about 5 hours on it now using the lights, switching them on and off, high beam down to low beam and back up, using flashers and high beams at the same time, everything I could think of that might overload a weak spot in the circuit and cause a repeat of the problem, nothing did. The lights are rock steady, no varying brightness with increased RPMs, they work every time. I did keep extras of each of the fuses so that should the problem repeat itself I am ready, but for now I can't imagine it happening, things are working well just as they were before the failure...but, isn't that the way it always works?
I'm not getting over confident, just hopefully optimistic.
Will resurect the thread if anything comes about, but for now life is good again in the Cobra!
Cheers, and thanks to ALL!
Dugly