What Happens When You Cut a Lamp in Half
Some materials are made to go unnoticed. Extruded aluminium is one of them. It frames windows, carries handrails, edges shopfronts and holds up suspended ceilings, produced in long lengths with the same profile and rarely looked at twice. Its value lies in repetition: a shape that is exactly the same at every point along its length.
Hall, a floor lamp by the Lausanne studio Panter&Tourron for the Swiss manufacturer Lehni, begins with exactly this kind of material and changes it once. A single extruded aluminium tube is cut in half along its length. One half is turned, and the two are joined again around a rigid strip of LED. The tube no longer closes. Where its edges used to meet, there is now a narrow, continuous seam of light, two metres tall. The construction is not hidden behind the effect. It is the effect.
Both processes behind the lamp are industrial and both are older than they look. Extrusion goes back to a press that Joseph Bramah patented in 1797 for making pipes from soft metal. Today a heated aluminium billet is pushed through a steel die and leaves it as a continuous profile with an unchanging cross section. The colour on Hall comes from anodising, an electrolytic process that thickens the thin oxide layer forming naturally on aluminium. The new layer is porous, so it can take up colour before it is sealed, and it becomes part of the surface rather than a coat laid on top. This is why anodised aluminium can be black or a deep red without ever looking painted. The process was first used industrially in 1923, to protect the parts of seaplanes from corrosion.
Stefano Panterotto, born in Italy in 1988, and Alexis Tourron, born in France in 1991, met at ECAL, the art and design university in Lausanne, where both completed a Master of Advanced Studies in Design for Luxury and Craftsmanship in 2015. A year later they founded their own studio in the city. Hall is a fitting object for that background: an industrial component handled with the attention usually reserved for craft, reduced to one gesture and carried out precisely enough that the gesture is all one sees.
The lamp was not first seen in Lehni's colours. At Milan Design Week 2026, Hall appeared as a limited edition developed with the surface technology company BWB and presented by Profiler Special Projects, at Capsule Plaza on Via Achille Maiocchi and at Spazio Vento as part of the Swiss exhibition Shared Matter. There, the tubes were anodised in vertical colour gradients, a way of bringing the anodising expertise BWB applies to architecture down to the scale of an interior object.
For its own collection, Lehni has made the lamp quieter. The gradients are gone. Hall now comes in three even finishes, clear, black and a deep black red anodised aluminium, and stands on a round, reflective base 30 centimetres across. Development, engineering and production were carried out with the Italian lighting company From Lighting. The dimmable LED gives a warm light of around 2700 Kelvin with a colour rendering index above 90, which makes the lamp a working light and not only an object. It joins a small group of lights at Lehni that includes the Floor Lamp, in the collection since 1981 and built, like most things there, from a few plain parts screwed together.
That restraint has a history. Lehni began in 1922, when Rudolf Lehni opened a sheet metal workshop not far from the Kunsthaus Zürich. In 1964 the company made the aluminium shelf that Andreas Christen designed for the Swiss National Exhibition. Folded from thin aluminium sheet, it gains its stability from the bend along its edges, and it has been part of the collection since 1970. Two decades later, Donald Judd encountered Christen's shelf, was taken with its light, bent construction, and from 1984 had his own furniture made by Lehni in brass, copper and aluminium, both clear anodised and painted. Since the mid 1970s the company has worked from a factory hall in Dübendorf, built for it by the architect Ernst Gisel.
Christen's shelf and Hall treat aluminium in the same way. Neither disguises the material or the single step that gives it form. In the shelf it is the fold, in the lamp it is the cut. Both take an industrial product in its plainest state, a sheet or a tube, and do one decisive thing to it. An earlier piece in this journal looked at the shelf as a cultural object; Hall extends the same thinking to light. Judd, for whom furniture had to work before anything else, put the boundary plainly.
If a chair or a building is not functional, if it appears to be only art, it is ridiculous.
Hall sits close to that line. It looks like a study in material, yet its seam exists to give light, and the lamp is built around that task rather than decorated with it.
The photographs for the series were taken among Lehni's shipping crates and in a working industrial hall rather than a styled interior, and the choice suits the object. Hall is at its clearest when the room around it is plain enough to let the line of light do the work. Switched off, it reads as a column of anodised metal. Switched on, the same tube becomes the frame for a single vertical light, which may be the most economical way a lamp can explain how it is made.
Images: Courtesy of Lehni
