its up to you, but I've heard of different people that get different results. I noticed a difference but others have not noticed a big difference. I have seen that site you mentioned before and I honestly don't know where they get that data. They are using a "visible light meter" well everyone sees light differently, how does this "meter" know? I thought it was much whiter and somewhat brighter then the stock bulbs and I could see more of the road because it was whiter... but everyone gives different results. Best bet might be to buy it from some place that will let you return it if you don't like it. One thing also, this site is upset because PIAA's claim of 55w=85w is untrue. PIAA never says it puts out 85 watts, it says it put out the same amount of light as an 85 watt bulb, which I think it does...
[Edited by mattadams on 08-31-2000 at 12:49 PM]