In light art works, light is the main medium of expression—an art form in which either a sculpture of some form produces light, or where light is used to create a kind of disembodied sculptural presence through the manipulation of light, colours, and shadows. We have chosen a selection of seminal artists—those that devote the majority or all of their creative experimentation to light— in order to trace a lineage of milestones through this compelling and distinctive medium.