As a plastic, immaterial medium, the use of light on stage is challenging: how to experiment, test, develop and communicate lighting intentions in advance of the performance? How, in other words, to model light? And for lighting practitioners, how to acquire, hone and reinvent techniques and a design sensibility? Lit models have been used for these purposes since at least the start of the twentieth century, working at various scales from the traditional 1:24 or 1:25 of the scenic designer’s model up to room-sized, quarter-scale model studios. In this article, I trace the crucial role of model-scale lighting and miniature lighting rigs in the development of lighting practice in the UK at key historical moments: in the 1950s when the named ro...