These high-output lamps have a 2-pin base that plugs into a vertical 2-pin socket matching the pin style and center-to-center distance between the pins Also known as bi-pin light bulbs, they are typically compact in size and commonly used in retail displays, under-cabinet fixtures, and desk lamps 70W T6 G12 Base Clear 3000K Double Ended Ceramic Universal Burn High Efficiency Metal Halide Light Bulb