PSLAB recently developed a set of custom cylindrical light fixtures for a London home and explains the concept in terms of the spatial requirements: "... we developed an installation of three large U-shaped arms fixed with a hinge system to the concrete frame, each carrying a stainless steel cylindrical lighting head at their end. The shape of the fittings responded directly to the volume of the space, and re-established the connection between the levels in the façade. Also due to their flexibility and size, the arms would, from one point of fixation, float over the whole area of the dining room. A fourth independent shorter arm would cover the stairs running along the side of the room. A similar language was developed for the lighting of the backyard with a system of cylindrical lights attached to the railing, unifying the interior and exterior spaces."

+ pslab.net