While we were staying with Mechanicky Gal, we went to Cabrillo National Monument to visit the tide pools. We also got to go into the Old Point Loma Lighthouse. Most of the rooms were closed off to the public, so you could look in and see what it would have looked like when it was in use.

The tide pools were gorgeous, and I loved walking along them.

Oh, well yes, there were a lot of rocks. So I took lots of pictures of rocks. Because I like rocks.

This is the Old Point Loma Lighthouse

You could walk up to almost the top of the tower, but you couldn’t go outside, or climb the ladder to the light.

I took this picture to remind me to look up when and why lighthouses would use different colored lights.

Short answer (according to the internet): it depended upon the light house. The rate of rotation (sometimes in combination with colors) could designate a specific lighthouse. The color could designate the location of the lighthouse in relation to the bay.

Also: This guy again.