Well there are two styles you should consider, the two good projectors available for the GP that is..
There are the spyder projectors which are the ones with two halos and the orange lights in the corner. Those take H1 bulbs for low beam and 9005 in the high beam.
The other ones with the three LED's on the inner corner take H3 for low beam, and H1 for high beam.
I have the ones with the three LED's. I like the light output, a lot better than the stock output. Spyders are supposed to have a crisper cut off line and a bit more out put. The ones I have put out plenty though.
