These luminaires typically consist of one or more high-intensity lamps surrounded by a translucent fabric balloon.
The upper portion of the balloon sometimes has a reflective inner coating to direct more of the light downward.
Some commercial products use a blower to expand the balloon, while others have an umbrella-like internal wire frame.
One of the first movies ever lit with this kind of system, was Mission: Impossible , directed by Brian De Palma, Director of Photography - Stephen H. Burum, Gaffer - Laurie Shane.
It was developed for the ‘embassy’ interior, which was shot at Národní Muzeum, Natural History Museum, Václavské námestí 68 in Prague.