I had never heard of a Trek light house, so I was intrigued when I opened the thread. Then, I thought that that lighthouse was on the wall. Now I see that it is actually welded to the frame!

That bike has some nice upgrades to it. Is that a TA crankset. I hadn't seen Matthouser (sp?) brake pads in a long time too. And it has Suntour bar con shifters.