H1 LED Headlight 9 to 40 Volts 8000 LM Pair. Works only negative ground. Wide voltage from 9 to 40 volts. Available in White 6000K. This bulb is not dimmable due to the wide voltage. Long life up to 30,000 hours. Comparable to a 55 to 65 Watt halogen bulb. Maximum voltage 45 volts. Includes two bulbs per package.