Necessity actually sparked Muller Van Severen's hanging lamp when the design couple found their home was missing a light socket above the table. Lacking an outlet for a plug overhead, they designed a lamp that could hang from the adjoining wall. The simplicity of N°5's squared-off and bent-tube steel construction brings to mind the graphic appeal of a line drawing—all capped off by a plainly visible lightbulb and an industrial glass shade copied from one of their flea-market finds.