DOI has been created as a suspension lamp system. The typology calls for one or more parts to be suspended from the ceiling by means of a cable, free to move and float in space, until their weight achieves stability to determine their position. The lamp appears to be stable, but is always in a state of tension. DOI is composed of two pieces: the disk (attached to the ceiling by a steel cable) and the spotlight (in extruded aluminium, powered by a slender electrical wire). The spotlight and the disk are available in three colors: white, matte black and brushed brass.