Abstract: Various embodiments provide a modular light shelf assembly in which individual light shelf units are substantially prefabricated. For example, in various embodiments, the assembly includes pre-fabricated support arms that are secured adjacent an interior wall of a building adjacent a window opening. Each of the support arms define at least one channel, and each light shelf includes at least one protrusion extending from each of a first side and a second side of the light shelf. The protrusion on the first side of the light shelf slidably engages the channel of the support arm adjacent the first side of the light shelf, and the protrusion on the second side of the light shelf slidably engages the channel on the support arm adjacent the second side of the light shelf to secure the light shelf between the adjacent support arms.

Abstract: Various embodiments provide a modular light shelf assembly in which individual light shelf units are substantially prefabricated. For example, in various embodiments, the assembly includes pre-fabricated support arms that are secured adjacent an interior wall of a building adjacent a window opening. Each of the support arms define at least one channel, and each light shelf includes at least one protrusion extending from each of a first side and a second side of the light shelf. The protrusion on the first side of the light shelf slidably engages the channel of the support arm adjacent the first side of the light shelf, and the protrusion on the second side of the light shelf slidably engages the channel on the support arm adjacent the second side of the light shelf to secure the light shelf between the adjacent support arms.

Abstract: A cleaning formulation comprising a cleaning agent, a particulate clay material and an aqueous carrier. In a preferred embodiment, the formulation has a pH less than about 1.0 and is characterized by: (i) at least a 90% reduction in viscosity at 25° C. at a shear rate of up to about 0.10 s−1, and (ii) a substantially unchanged viscosity for a period of at least 60 days. The cleaning formulation is thixotropic and has a highly desirable combination of acid stability, temperature stability, electrolyte stability and ultraviolet radiation stability.

Abstract: An electrical device assembly, for mounting behind a wall surface, includes an electrical device mechanically attached to a mounting plate, and a rigid protector extending over the device to protect the device during wall construction. The hard metal protector enables an uninterrupted sheet of drywall or other wall facing material, hung in place over the device, to be cut through with a saw or router without risk of damaging the device by incidental contact with the cutting blade.