Here is my 2 cents, I did not believe the hype on the package, but I will say the ultra white light does make you more noticeable during the day and night. At night it seems about the same output as stock, but clarity, because of how white the light is makes it seem better to me. As for life span I will let you know. Worth 150 bucks to me, so I am more visible to other drivers.
Lots of tourists and other idiots wear I live need all the help I can get.