The farthest into Virginia that I have made it was to Virginia Beach. I had plans to go through / across the Chesapeake Bay Bridge Tunnel, but it had taken me longer to get to the beach than I had anticipated, so we cut our trip short. So the only lights that I had visited were Old Cape Henry and New Cape Henry at the northern tip of Virginia Beach. One other neat place I would highly recommend visiting while in Virginia Beach is the Old Life Saving Museum.
There are 4 lighthouses featured on this site for Virginia.