OK, i just got a Shimano HB-NX30 hub, a Lumotec Oval Plus and a 4D multi senso taillight, and i have a few questions.

1. does the hub have a voltage limiter in it?

2. does the hub become less efficient the faster i go?

3. what is the best way to hook up the light?

when i hook up the light (but do not mount the light on the bicycle and spin the wheel, the switch on the light works properly. when the switch is off, the light is off. when i mount the light on the bicycle, the switch DOESN'T work anymore. so i figure the switch is shorted out by the bike. the hub is grounded and the light is grounded.

4. is this expected behaviour? it seems "broken out of the box." i don't understand why it is designed this way. what am i missing? if everything is supposed to be grounded, then the switch seems useless.

i have a 2.4 watt bulb and a 0.6 watt taillight.

5. do i want to hook these up in parallel or in series? i think parallel.

6. if i want to add a second light, do i do that in parallel or series? i think parallel.

7. how does the motion sensor on the 4D multi senso work? i thought it came off of the energy pulses from the hub, but i disconnected it from the hub and it still came on when i started to ride home in the dark. that was unexpected, but i am glad that it works like that.
8. how long does the 4D senso multi stay on after there is plenty of light or the bike stops moving.