So I have these lamps now installed equal to at least three months and all 10. For three months I have not had a failure and could detect no light the dark, poor contact or even flicker! All 10 built into a 5 he funzen BMW E39 Touring BJ 2003 super bright and dim even with! Thank the price makes it almost unbelievable! UPDATE 08/04/2014 AND STILL LIGHTS ALL EQUAL HELL AND no defect!