H13 LED Headlight 9 to 40 Volts No Polarity 12000 LM Pair. Works either positive ground or negative ground from 9 to 40 volts. Up to 6000 Lumens per bulb. This bulb is not dimmable due to the wide voltage. Up to 30,000 hour life. These led bulbs do not have load equalizers. Load equalizers may be required to make led headlight bulbs operate correctly. 2 year warranty.