I checked the www.piaa.com website and the model Slim must be talking about is the 510 series available in Ion Crystal Fog complete kit #5161 and Super White Pencil complete kit #5164

I would want the fog version for why would anyone want the super pencil version if you are not always traveling at a high rate of speed on straights in perfect night weather unless you are a street racer.

Would it not be better to simply by the 880/893 50 watt bulb available thru BAT?