Purchased mine in 2011 and they still work. Didn't purchase them from Van ( would have if I knew he sold them) and no problems so far. I burn them whenever the car is on even in the daytime. I have a true kit I purchased for 50 bucks on sale last year. If one ever Burns out ill go true hid fogs. So far so good. Never had any visibility enhancement from fog lights. If I see them then the headlights must be out