LED Bi-Pin Lamps

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LED bi-pin lamps are an energy efficient, long-lasting and effective replacement for current halogen bi-pin lamps. A bi-pin is a standard from the International Electrotechnical Commission (IEC) for lamp fittings. Bi-pins are used on many LED lights including LED MR11 & MR16.

Reginald Fessenden invented the bi-pin base in 1893 for the World’s Fair in Chicago. This was the first electrified fair and Fessenden won the contract to wire and illuminate it with AC over archrival Thomas Edison’s DC. Edison refused to allow his Edison screw base bulbs to be used. Fessenden overcame this by inventing the bi-pin base.

Pin spacing is the measurement of the spacing of the pins at the base of the lamp. Various lamps have different pin spacing so it is important that when by bi-pin lamps they are the same pin spacing and diameter as the receptacle that is installed in the light fitting.

Bi-pins are differentiated by their lettering and numbering. The letters G, GU, GX, GY, GZ etc determine the diameter of the pin and its shape. The numbers following the letters describe the distance between the pins. For example, a G4 would have a distance of 4mm from the center of one pin to the center of the other pin. A G5.3 would equal a distance of 5.33mm, a GU10 10mm etc.