9 PARTS FOR LUMINAIRES, NAMELY, LIGHT SENSORS, PUSH-BUTTON CONTROLS, POTENTIOMETER CONTROLS, SIGNAL AMPLIFIERS, LIGHT VALUE SWITCHES, SWITCHING/DIMMING DEVICES IN THE NATURE OF ELECTRIC LIGHT DIMMERS AND ELECTRIC LIGHT DIMMER SWITCHES FOR THE CONNECTION OF LUMINAIRES TO BUS OPERATING SYSTEMS AND BUILDING LIGHTING MANAGEMENT SYSTEMS, REGULATORS FOR CONSTANT LIGHT LEVELS, ELECTRICAL CONTROLLERS, ELECTRIC TERMINALS, ELECTRICAL CABLES AND CABLE HOLDERS, ELECTRICAL CABLE GLANDS; ELECTRICAL CONTROL UNITS FOR LUMINAIRES, CONSISTING OF SWITCHES, MOUNTING ACCESSORIES, NAMELY, END CAPS, ELECTRICAL CONNECTORS, BALANCING WEIGHTS AND GROMMETS, SOLD AS A UNIT; FIBER OPTIC LIGHTING SYSTEMS CONSISTING OF AN OPTICAL FIBER HARNESS WITH LIGHT EMISSION ELEMENTS IN THE NATURE OF PRISMS, LENSES REFLECTORS; LIGHT PIPES; AND LOUDSPEAKERS