12 Volt non polarity, up to 950 Lumen output for high beam. Up to 700 Lumen output for low beam. Dual filament. The bayonets are parallel. Works either 12 Volt positive ground or 12 Volt negative ground. 60 5730 SMD's very bright. Long life up to 30,000 hours. The leds are optically aligned with the reflector for maximum led light output. This led headlamp as 20 forward firing and 40 side firing led's. This bulb is non polarity sensitive so you can use it in both positive or negative ground vehicles, motorcycles and trucks. The bulb is dim-able using a variable voltage source such as your dashboard dimmer switch. Comparable to a 35 to 55 Watt incandescent. Available in White 6000 K, Warm White 3000 K. UP to 70 CP for the high beam. The maximum overall length M.O.L is 1.944". The maximum diameter is 1.05". Up to 300 Lumen for forward firing for the high beam. Up to 600 Lumen for side firing for the high beam. Up to 200 Lumen for forward firing low beam. Up to 400 Lumen for side firing for the low beam. Uses up to .5 Amp @ 12 Volts for high beam and up to .425 Amps @ 12 Volts for low beam.