For the duration of this year's London Design Festival, the Norfolk House Music Room at the V&A will briefly regain a normally absent, yet essential element.

And that element is music.

In a piece called 'Kinetic Light 2 - Gold Pendulum' London-based artist Michael Anastassiades will substitute Sound’s silent sister with Light - mischievously, reductively and poetically.

Like a silent inverted metronome, the hanging arm of this bespoke installation holds a glass light ball which describes a perpetual rhythm.

Standing in for the now-absent violins, Baroque guitars, and the occasional cornemuse which once filled this vital 18th century room with movement during grand occasions, Edison's light bulb – a different kind of instrument - will fill the space with movement with kinetic swing.

Actually, if you also take into account the speed of light, (which travels in a vacuum at exactly 299,792,458 meters per second) that's one quick waltz...