These bulbs, while illuminating street signs and reflective surfaces at greater distances than your standard bulb (which is useless, by the way, because those are not the obstacles you are trying to avoid in darker environments), are probably the biggest waste of money out in the automotive market. They are rated to work for as long as '2000 hours,' but really they mean 200 hours. I bought my first set in April; when my passenger side burned out 3 months later, I had assumed it was a fluke and bought a second pair. When my drivers side bulb burned out a month later, I was pissed (especially since the original lights had lasted more than 3 years).I would not buy these 'High Performance'-type bulbs again. I would heavily recommend against buying these bulbs. I will never buy a Sylvania light bulb so long as I live.Note: I would give this 0 stars, but that isn't an acceptable rating so I was forced to acknowledge this P.O.S. product with a '1 star.'