This is for a short duration power load, not average power. Control surfaces that are typically hydraulic are now electric. Should all of these control surface activate at once, combined with all of the other systems that can be operational, the power consumption would exceed the power generation capability of the generators.
I work on a system that normally draws less than 100 watts, but when active, can draw thousands of watts for a few hundred milliseconds.
How much power do you think the JSF should use?
I was merely stating my surprize at the electrical demands of the aircraft.