The results are in for the 10 lighthouses listed above and we ended up with a 3-way tie for the top 2 spots. I've decided to use the 3 lighthouses that were tied with 10 votes apiece instead of having another runoff. Here is the way the voting ended up:

RUN OFF VOTE RESULTS
Pensacola (10)
SE Block Island (10)
White Shoal (10)
Cape Charles (6)
Waugoshance (6)
Key West (5)
Mukilteo (5)
Drum point (4)
Fort Jefferson (4)
New London Ledge (4)

I appreciate everybody that took the time to vote!