I recently installed an H7 Led Headlight kit 12V/25W in place of a standard halogen 55w bulb. Lights are great, but they flash periodically during can-bus Cold/Warm checks to see if a bulb is out.
I was advised to install a 55Watt 6Ω Resistor that will prevent the LEDs from flickering during checks, but work normally when switched on.
Now from my basic electronic knowledge I calculated using Ohm's-law the resistor needed as:
for the halo I1 = 55W / 12V = 4.58A and and the LEDs I2 = 25W / 12V = 2.08A
so the difference of 30W is 2.5Amps that translates into:
R = V/I = 12 / 2.5 = 4.8 Ω
My question is (provided my calculations are correct :P) will the 6 Ω resistance cut off light output from the LEDs or was it indeed correctly recommended or I should look for a ~5 Ohm ?