i have x2 3.3V (typical)-3.6V (max) 25mA, and i need to make a serial conection with these 2 LEDs to the 12V fog light electrical wire in my car. i just dont know what RESISTOR i should use,(how many ohms it should have). i dont know how to do the math to find out maximum W output for the Superbright LEDs without burning the LEDs out. can anyone tell me the resistor gauge/size i should be using?