I have no experience with PIAA bulbs, but I have used 80w lowbeams/100 watt highs with adequate results. Got a lot of flashes by other drivers though. I got rid of the stock bulbs and put in an HID set-up. 6000K is the whitest(brightest) light you can get (a higher K number only changes color, not intensity) I used Luminics ultra white bulbs in the foglamp housing (the silverstars weren't bright enough) and they are close to matching my HID bulbs (colorwise). Next, its going to be LED bulbs for everything else, should look pretty cool. BC