Nobody is an abstract entity, substance without body: a metal sphere free to move through space. Only a slender and ethereal structure supports it from the ceiling, making it float in mid-air.
Nobody is also a Homeric reference, a tribute to the cunning of Ulysses who succeeded in escaping from the cave of the one-eyed giant Polyphemus by telling him his name was Nobody: the diffuser of the light fitting can be intended as a single eye to be positioned as desired.