My picks for the Fab 4 (in no particular order):
Mile Rock, CA (the 1st lighthouse I ever saw!)
Cape Hatteras moving
Skerries Light, UK (it's on the isle of Anglesey) for the GLOW collection
Point Bonita, CA (it's interesting-one walks through a tunnel in the cliff, complete with a door, then out over a bridge to the light. Could be a really impressive piece if the surroundings are included.)The 2nd lighthouse I saw. The third has already been done-Pigeon Point!