According to this current draw is 4.30 Amps at 12 volts which is not low compare to halogen.
Well, yeah, it is. 4.3 Amps times 12 Volts = 51.6 Watts, which is lower than most halogen headlamps. But the lamp you linked has a lens heater grid. The version without the heater is this one, with 1.94A on high beam and 1.67A on low beam -- very low compared to halogen.