Can be sued with the CLM series Loco Liting modules for working head, ditch, marker or numberboard lights on locos, plus marker light for caboose or passenger equipment. Also used for military, aircraft and vehicle models. Requires 1.5V power source, draws a low 15mA of current. Using the CIL-125 LitePac(tm) (#269-125), 50 to 75 of these bulbs can be used on a layout. Includes one assembled axial-design bulb with 1" wire leads, (bulbs are pretested before packaging), insulation material and instructions.