Here's what I've noticed so far. The stock bulb sucks. I have tried the "Extreme" bulbs in the same wattage as the stock ones, 55/60...anything higher will melt plastic. I've also tried the Silvania Silverstar. The Silverstar produces a bright white light...and works very well at night and is visible during the day on high-beam. The PIAA style bulbs produced a blue light...which jumps out during the day on high-beam...very hard to miss. But at night, it's very ineffective. I've heard the scientific explanation...ssomething about not producing enough violet light...whatever it is, the "Extreme" bulbs with the blue tint are pretty useless at night. Stay with white...I wouldn't recommend hte blue tinted one. And high-beam on 99.9% of the time...only if I'm in traffic, at night in the city will I run with only the low beam at night.