LED Conversion/upgrade bulb British Rail Bardic Signalling Lamp P13.5 3-6V-
Available socket: P13.5S. 1W 4.5V 6V donot need to distinguish the positive polarity "+" and negative polarity "-". Model: P13.5S-0.5W LED Torch Light. Fit for: interior lights,Bike,Torch lights,Flashlights,Work Lights,etc.