I'm looking for replacement bulbs. I did a bit of research, and it looks as if the bulb has long leads that are soldered into the black plastic fitting. I cannot see how just replacing the bulbs would work. It looks like a whole new piece is needed. Looks like a Christmas string buld, but a bit bigger. I have been told to replace the whole unit, and someone else said just jam a new bulb in there. Any help would be greatly appreciated. Thanks in advance.