I have purchase the super white blue DRL #3157 at AutoZone & Checkers ($5 to $6). I have had two pair burn out within one week of use. I have replaced the originals back in the DRL. I am wondering if the reason they are buring out is due to the fact that I have jumped the DRLs to stay on with headlamps. Or is it just a cheap bulb - the originals do have a little burn-mark at each base but work great as if it were the first day. Any thoughts!