P36D 5 to 30 Volt positive ground or negative ground non polarized. Made with 2525 led's for long life up to 30,000 hours. High Lumens up to 1200 Lumens. Uses only .8 Amps. Works great for 6 volt vintage cars, motorcycles and tractors. The heat sink is made of aluminum to make the leds operate cooler so they are brighter and last longer. CE and Rohs listed. Comparable to a 45 to 55 Watt incandescent light bulb. Takes just minutes to install. Just remove the old bulb and insert the new led bulb. The base is P36D has one contact on the bottom and diameter of flange is 36mm. Dimensions are overall length is 2.52 inches. The width is 0.98 inches. Load equalizers may be required, if the bulb will not switch from low beam to high beam or if the bulb flickers when installed. Please install led light load equalizers to fix the problem product code 65832. Available in White 6000K to 6500K.