Architecture ProductsProducts by TypeLighting & Electrical There is a quiet assumption baked into most commercial lighting specifications: that the recessed downlight, once installed, is finished. The fixture goes into the ceiling, the trim snaps flush, and the design intent is realized. For the architect, the moment of installation is the moment of completion. For the building, it is only the beginning of a service life that will be measured in decades—and punctuated, inevitably, by failure.