G4 Round MCOB 1.85 Watt bulb, Up to 110 lumen output, long life up to 30,000 hours, 180 degree viewing angle, 12 volt AC or DC. CRI>75, The G4 pins are on the back side. Nice metal to cool the MCOB. Available in white 6000K and warm white 3000K. This G4 is also called foward firing, since the pins are on the back side.