Abstract: A miniature lighting instrument for high quality architectural and display purposes features a sectionalized coaxial configuration. A base body, available with either a side- or rear-entry mounting adaptor, either fixed or swivel, is threadedly coupled to a midsection body available with a choice of smooth surface, lateral cooling ribs or fluted cooling ribs. The midsection body encloses an optical quality low voltage prefocused reflector type lamp. A selection of front barrels is available for threadedly coupling onto the front of the midsection body. The selection includes a long barrel for narrow-beam spotlighting, a short barrel for wide-beam floodlighting, a side-throw barrel for ultra-wide-angle floodlighting, and a projector barrel assembly with a front mounted lens and adjustable threaded mid-coupling for focusing.