P15D-25-1 base. Dual filament. This bulb up to 950 Lumen or 70 CP for high beam. Low beam up to 700 Lumens or 56 CP for low beam. 12 Volt non polarity works either positive ground or negative ground. Uses 60 5730 smd leds. Up to 57 to 67 Watt incandescent equivalent. The leds are aligned with your reflector for maximum light output. Dim-able with a variable DC supply such as a dimmer switch. Available in white 6000K and warm white 3000k. Extended warranty, please see detail page for more information. Maximum overall length is 1.944 inches. The maximum diameter is 1.058" Compatible with: p15d-25-1 PX15d H6 h6m P15D