For those of you that aren't familiar with this event: Once a year (or every other year depending on funding), the Pigeon Point lighthouse in California changes out of their modern light and brings the old Fresnel lens back for a few hours. Better still, they freeze it for five minutes just for us photographers so that we can capture the beams.
It was a bit of a scramble, trying to figure out the best settings to use, as it was a bunch of trial and error. At around 30 seconds per exposure, you don't get too many opportunities to get it right. I had a great time meeting some fun people, and witnessing a really neat event.