I am using an H4 setup with Hella H4 headlamps. These replace the standard low beam headlamps. I then recently purchased a pair of PIAA H4 bulbs with the XTRA, Xtreme technology. Produces twice the watts output as input. ie 60w=120w. I then put in NEW conventional halogens for high beams. Everything works as it is suppose to with no system strains, the low beams are much more efficient and I can actually see now. The brights are like daylight - wow. The PIAA bulbs are DOT approved and I have a stock look until you turn on the lights - the light is MUCH whiter. Draw back? A bit pricy. $80 for the Hellas, $75 for the PIAA's and $15 for the new high beams but, it's plug and play. Harold McElraft - 3354