So I climbed the mast with the climber. The guy on the video made it look easier, so I'm certain I got the wrong one...but Tammy says I'm not in the same shape as him. I've accomplished getting the right part numbers for marinebeam.com replacements and ordered an anchor light which automatically shuts off in the day. The marinebeam.com are only a fraction the watts of the current bulbs. We discovered we have a deck light also. Did I mention I have an aversion to heights, hmmm? Now I have to go back up or better idea send Tammy up!