These grain-of-rice sized lamps are specially manufactured for Micro-Mark with a 12v, 30ma rating so they can be wired directly to the function outputs of model railroad DCC decoders without fear of electronic overload or plastic-melting heat generation (with proper mounting and ventilation). Measuring a compact 3/32 inch dia. x 3/16 inch long, these lamps are made of high-grade glass, with long-life filaments and durable 6 inch leads. Of course, they can be used for all types of micro-lighting applications.