LED bulbs for replacements of HID/halogen is no good yet. LED technology is not quite there yet for replacement for HID bulbs.
I know, i have done Corolla LED projectors retrofits, Acura LED projectors, etc. Your better bed is the LED projectors i just mentioned but thats a waste of time for our car.
If your Ballast is going out, you should look into that. Quality ballast (OEM like Denso for example) last the entire life of the car.
BUT if you must know, you should become a hidplanet forum member. A library that is full of so much information your brain will explode. If you are wanting better output, i woudl start with clear lens, better ballast, high quality bulbs (Osram CBI). Our car's ballast are sensitive to aftermarket bulbs.
Good luck.
