Model 204, nicknamed "The Mushroom" was created by Vilhelm Wohlert in 1957. Naturally, it is the shape of the lamp that inspired the name of the lamp. The lamp was used for Nobel Prize winner and physicist Niels Bohr's honorary residence in Copenhagen.

Wilhelm Wohlert trained at the Royal Danish Academy of Fine Arts in Copenhagen, where he was taught by Kaare Klint. He was employed by the Academy as Professor of Structural Art from 1968-1986 and was nominated honorary member in 2001. He was awarded the Academy's 'little' Gold Award, the Eckersberg Medal, the Danish National League for Built Heritage and Landscape's Cultural Prize and several other distinctions.

The lamp is a wall lamp with a base in untreated light oak or smoked oak, white PVC cord with on/off switch on cord. The pleated shade is handmade by Le Klint's pleating technicians in Odense.