Halogen Bulb, Bulb Base Type 2-Pin (G4), Bulb Beam Angle Not Applicable, Bulb Dia. 3/8 in, Bulb Housing Glass, Bulb Shape T2-3/4, Color Rendering Index Not Applicable, Color Temperature 2800K, Incandescent Wattage Equivalency 10 W, Lumens 277 lm, Light Technology Halogen, Overall Length 1 1/4 in, Shatter-Resistant No, Trade Number 780, Voltage 12V, Watts 12 W, Rated Life 50 hr, Bulb Finish Clear, Dimmable No, For Enclosed Fixtures No, Three-Way No, Light Color White These T-shaped miniature light bulbs have a 2-pin base, also called a G4 base or a bi-pin base. There are two pins on the bottom of the bulb's base, and the pins are spaced 4mm apart. The bulbs are pushed into a compatible socket when installing them.T-shaped miniature light bulbs are shaped like a tube, so they are sometimes k.