Put in a set of the Silverstar 9006 bulbs in brand new light fixtures back in late October. Yesterday, both failed. Drove home with the highbeams on which was getting some people slightly preterbed.

Put in a set of cheap halogens today and everything seems to be fine.

Is this a normal occurrence for these bulbs to only last 4 months?

And for both to go at the same time makes me wonder if something else may be happening.

Any comments?

Mark