LED headlight P15D-25-3 Base. 6 Volt positive ground and 6 Volt negative ground. For classic and vintage vehicles that use the P15D-25-3 pre focus base. Long life up to 30,000 hours. Comparable to a 27 Watt to 35 Watt incandescent light bulb. 360 degree viewing. Available in white 6000K and warm white 3000K. Up to 600 Lumen output. Uses 5730 leds. The LEDs are positioned for the best optically aligned LED to reflector. Due to this alignment you get the best led output. This bulb is dim-able using a variable voltage supply.