get the HID (High Intensity Discharge) bulbs, i got them on my PT as you can see in my pics and are about 300% brighter and pass the traffic laws so they are good buy for 140 bux. get the 6000k or the 8000k from
3B Specialties
BTW.... your also gonna need a battery relay kit that connects str8 to the battery for better results and no flcikering lights.