They are the Poulsen PH 4/3 pendant lamps. These ones are vintage from Denmark but they are still made and available from a number of suppliers.
I live in the USA. How can I obtain them?
Have a look at louispoulsen.com they have 75 dealers in USA
You're welcome
Egon Walesch Interior Design
Dawn IsbyАвтор
Egon Walesch Interior Design
Egon Walesch Interior Design