The lighthouse

Once I went on a cruise with my family and it was a blast. One night I saw a lighthouse and my brother saw it as well. The light was on in the middle of the night. My brother was just looking at the light. Then the light blinded him………. That night we went to bed. 8 hours later!!! The next morning I had a look through the window. I felt so serious. Why are we still at the lighthouse? The light was off this time. A few hours later!!! The ship landed back at Dublin port and like I said the cruise was a blast.