What is a pin light?
Also question is, what is the difference between g4 and g8 bulbs? If your bi-pin bulb measures 4 millimeters between pins, you have a G4 base bulb which comes in 6, 12, or 24 Volts. A measurement of 8 millimeters means you have a G8 base xenon bulb, which only comes in 120 Volts.