Miniature bulbs range in size from “grain of wheat” lamps to the larger automotive headlights. The term miniature light bulb is not so much indicative of physical size as it is too low operating voltage. The operating voltage is rarely more than 28 volts and often as little a 1.5 volts. The part numbers of miniatures are identified by a standard industry number that indicates physical and electrical characteristics. Additional suffixes may be added to indicate color or material. Lamp manufacturers that use the industry standard part number have designed their product to be in accordance to the American National (ANSI/NEMA) standards for miniature lamps. Miniature bulbs are used in a wide variety of applications: medical and optical equipment, indicator lights, automotive applications, model train replacement lights, hobby and crafts replacement bulbs, aircraft lighting, flashlights and more.