Flash G4 Bi-Pin Hal 20w 12V

A bipin or bi-pin (sometimes referred to as two-pin, bipin cap or bipin socket) is a type of lamp fitting.

A G4 light bulb is a bi-pin base lamp that runs off a low-voltage power supply. “G4” is a base designation which means the base has two pins and the gap width between the pins (center to center) is 4 millimeters.