Self Adhesive LED Strip with 12 LEDs (20 cm long). Two laser etched pickups with tabs for screws (or you can glue them), screws, black and red ultra fine multistrand wire (+ two resistors to reduce the brightness if required if used on DCC). Full instructions with step by step photos. Available in Cool White, Warm White or Amber.
Although aimed at DCC these will work on DC but please note that the lights will go out when reversing the train. However with the addition of a small bridge rectifier or by adding an extra LED strip wired the opposite way round to the first they will work in both directions.