6 Volt LED bulb operates in both positive ground and negative ground. Up to 355 Lumen output for White 6000K. Up to 358 Lumen output for Warm White 3000K. Up to 72 Lumen output for Red. Up to 71 Lumen output for Yellow/Amber. Up to 84 Lumen output for Green. Up to 85 Lumen output for Blue. This bulb is a single filament. Long life up to 30,000 hours.  Made with quality 5730 led chips. These LED bulbs do not have built in load equalizers and may require load equalizers to be installed to operate correctly. The bulb starts to illuminate at 4.11 volts. The maximum bulb voltage is 18 volts. The BA15S diameter is 15mm, has even bayonets and one contact on the bottom.  Available in White 6000K, Warm White 3000K, Red, Yellow/Amber, Green and Blue. If the color is not listed then we are out of stock of that color and takes about 4 to 8 weeks to restock that color. Size MOL from top to bottom is 1.47" and the diameter is 0.78". Uses approximately 2.6 Watts comparable to a 25 Watt incandescent bulb. Every bulb is tested before shipping.  Included are two bulbs per package.  Please make sure the vehicle or motorcycle is regulated to approximately 6 volts. The bulbs are warrantied 1 year from date of purchase. CE and Rohs