im a little confused about how drive my led's ive got some K2 LED's soon to order some P4's, im building a light using a cut down mag lite and some lenes from dotlight. ive got a 1400mA driver, now if i put say 4 leds in series at 3.2 volts will i need to have a input voltage of 12.8volts on the input side of the driver? i dont know how they work