A method for manufacturing an inexpensive lamp, which suppresses distortion of a bulb and prevents decrease in commercial value and breakage of the bulb. The electrode assemblies of the invention include passageways that lead from the inner lumen of the assemblies to the surface of the assemblies, wherein the passageways have a smooth conjunction with the outer surface. The HUB includes therein a power feed section. One embodiment relates to a ceiling lift display. An actuation mechanism can include a slot to engage the actuation posts and open or close the blades of the scissor assembly.