Sven, I think that the pipe there, is PB plumbing pipe, that's been painted over. The person that installed this mess wasn't hanging around, I'd at least have fitted a few more saddles to the pipe, to make sure it was nice and straight!.(If my work standard WAS this rough!) Are these fittings legal, for this type of use?, I note that you said that they are used as ceiling fixtures.(Indoors, I assume) One more thing, them lamps are pointing pretty much up in the air, OK if you want to light the sky up.
Could be that the only way to get the lamps to work for more that ½ a seconds was to turn on the "cooling fan". The ace wannabe never realized that he’d scabbed them into the 240V range circuit. [The fatter wire—the better, right?]
Are these fittings legal, for this type of use?, I note that you said that they are used as ceiling fixtures.(Indoors, I assume)
I personally wouldn't use such a thing outside. The globe ceiling fixtures I'm talking about consist of a stamped & shaped tin base (looks almost like a little casserole dish), with a hole punched out for a snap-in lampholder.
Around the business end of the "dish" is a flange with holes for little screws.
A lip from a globe fits into this flange. The screws go into the lip, holding it in place. Nothing really to keep water out should you use this outdoors.
Rick, was that fixture the metal "base" of those things I just posted? That's what it looks like from the picture - 'course I can't really zoom in to take a closer look.
Trumpy, the adapter that allows you to be able to screw two bulbs into one socket is this:
I was thinking they looked more like this light fixture minus the glass and cage. Even then I am pretty sure this type of fixture is not meant to be mounted vertically. We have lots of fixtures like this at the plant, and it would unfortunately be quite possible to put that siamese socket splitter into service (not to mention flood lights).
I would hate to see what is inside the building, if they are that loose with what is so easily seen.