A tool box assembly provides a tool box that can also be used as a step stool and a bench. At least mercury and halogen are contained in the luminous bulb, and at least one metal selected from the group consisting of Pt, Ir, Rh, Ru and Re is present in the luminous bulb. The invention also extends to methods for isolating such plants. The portion of the roof of the canopy surrounding the upper end of the defective column is cut away and a portion of the base of the service station concrete floor surrounding the lower end is removed to allow the defective column to be disconnected from the canopy frame and foundation, respectively.