Source: http://gizmodo.com/5896554/optical-illusion-turns-simple-pendant-into-an-elaborate-chandelier
When design shop Troika was called upon to create a series of unique chandeliers for the Royal Society of Arts' headquarters in London, instead of engineering some hanging crystal monstrosity, they created a subtle fixture that barely exists when the lights are off.
A small brass pendant filled with eight high-power LEDs hangs from the ceiling. The light source shines upward through a fresnel lens. The refracted projection creates a series of overlapping circular patterns on the ceiling, giving the appearance of an elaborate chandelier overhead. The new chandeliers are efficient, they collect very little dust, and in the event of a disastrous crash, like in The Phantom of the Opera, they're practically harmless. [Dezeen via CribCandy]