Hii guys thank you for the interest
Its a Suzuki AX 100. We have something similar to a MOT test but police here don't care. If you have two light and license plate you are good.
Today I tested the "Cree LED Lamp" with the better step-up. With the voltage set at 8.5v and current limited at 300mA the LEDs provide almost maximum brightness. From the 6v side consumes 700mA
Now I have another problem since it doesn't have a actual voltage regulator, if you reduce the load the voltage spikes a lot and cooks my battery. So probably I will install some 25Wwire resistor to ground to maintain 7-8v.
The electrical part is super basic, it a single phase coil that doesn't provide more 25-30W IMO
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Have you tried a 12V lamp designed to work from AC? I have some 12V LED lamps which have a built-in current-limited DC:DC converter and they work from a 9V battery.
Do you have a link ? I think aren't available in Arg