I'll chime in here.... I run the PIAA super Plasma bulb and have noticed that my bulb doesn't see to dim like the standard halogen bulb at low rpms and the coating on the bulb makes the light appear cooler and brighter rather than the yellowish cast of the Halogen bulb. Also have had no complaints from other riders either passing or following as for the bulb being to bright. As long as your lights are aimed properly you shouldn't have an issue with blinding oncoming traffic. And as stated above some people seem to ride like they are running a snow cross through the woods which at those rates of speed and admittedly bright possibly blinding light could cause an accident.... but so does near out of control reckless high spped riding through the tight and twisties... I also know from experience as a few years ago I almost had a head on collision with a guy (2 guys) that was trail racing his buddy... You can guess that I was upset that I almost got taken out by this type of rider.... Many people think that since there are no lines or speed limit signs in the trails that they can do as they wish... as with anything one bad apple spoils the bushel....