I got there late, but snapped up a marina electric cable and sockets/plugs for a tenner, which made me very happy, and a spare Aqua Signal 40 masthead light minus the base, but with one good bulb, for a quid, which made me even happier, as it's far easier, when in a bosun's chair at maximum elevation, to unclick and swap the whole unit than to take the thing off, change the bulb and put it back!