LED headlamp works either positive ground or negative ground. Wide voltage from 5 to 30 Volts AC or DC. No polarity, Bi polarity, non polarized. Made with 16 CREE 2525 smd leds for super bright leds. The headlamp lights on both sides. Dual filament both a low and high beam. The low beam Lumen output is up to 1200 Lumens. The high beam is up to 1800 Lumens. Great for vintage and classic cars. Long life up to 30,000 hours. CE and Rohs certified. Made with aluminum to keep the CREE leds cool so they can operate long life. The circuit board is constant current so the leds should not flicker. Available in White 6500k. Perfectly works with product 69854 is a 7" round semi sealed housing and 68721 is a 5"x7" rectangle housing. Both these semi sealed housings use the P43T bulb. This allows both the housing and the bulb to be upgraded for the older vehicles that are 6 volt positive ground or 12 volt positive ground.