That is an Awesom page you have there. I love to look at old articles like those, I accualy added it to my bookmarks so I can look at some more of it. One thing about these light heads is that the wind likes to catch them and spin them sideways on the bracket I know from having the correct some at Perry Point VA hospital. I would go and get some pics but I don't know if I could get on the property after 9/11 without proper cradentials. (I.D).
That site has a lot of pretty interesting stuff, it also has pics of the collection at the BSL museum in LA, pics of the Hollywood specials, and a handy date code decoder.
Apparently GE also made a two lamp version.