which vision plus bulbs burned out so quickly h7 or h4.
i was [14 months] running the philips vision plus 50 until recently, never had any problems, nice white light.
below is a pic of european osram silverstar h4 [from www.powerbulbs.com
and a sylvania silverstar 9005 u.s.
you can see the slight blue tint on 9005 bulb.