Today I tryed to direct drive a red Luxeon 3W LED using a 3.7V li-ion batt and a 1ohm resistor, the bright was good, but when I messure the amps it was only 200mA, so I increassed the voltage and I needed near 10V to reach te 1.4V rated to this LED, what did I do wrong? when I got the 1,4A the voltage at the LED`s pins were 5V!!! I don't understand