I don't know if you know this, but these bulbs are illegal on any road cars - there are normally sold for off-road use only. Next, current, the load current will be greater than what the wiring was meant to carry under worst conditions = possible fire. Next, as most of these cars have plastic "windows" on the lights, this extra heat and the bulb waste heat will rise in proportion to the wattage, might just destroy the plastic parts of these lights - well cause them to distort or "yellow" which will rather waste all this extra lumens that you have found.