I know Lowel make "Lampaks" for specific lamps that go with their fixtures, but depending on what you are using they work - an FRK 650W lamps works in all 650 fixtures. They have them at B&H. Search "Lampak" at their site. They are about $15 each, depending.
I use foam with slits I cut in it inside small Rubbermaid kitchen storage boxes. Works just fine.
Tungsten refers to the filament. Edison refers to the type attachment to the fixture - in the case of Edison, the whole base of the bulb is a screw, just like an ordinary household bulb.