I recently picked up some lights off of ebay, just a random lot of instruments. I did this for the two pars in the middle of the pic. But I was wondering what the other two lights are, I'm thinking about just chunking them, but was just wondering what these were.
I, too, do not think the ERSs are Kliegl, they look more like Century (Lighting Corporation of America) to me. I don't see lamp caps on either of them, and if so, asbestos is not an issue. Paint them up nice, and make table lamps out of the fixtures, and put them back on ebay for a nice profit! You'll need to fabricate a yoke for the one on the right, but that's not difficult.
As for amber drift, all incandescent lamps exhibit this phenomenon. If these fixtures had their original medium prefocus sockets, the EGG lamp would give a color temperature of 3200K. They may have come with a medium or mogul bipost socket, and would need a T14 lamp. The 8" may have taken up to a 1M lamp, but the 6" topped out at 750W.