Over the holidays I switched from Sylvania Silverstar bulbs to GE Nighthawk bulbs on my Tahoe.
I've had a little bit of a problem with lifespan on the Silverstars. In all fairness, Sylvania has sent me two free replacements, and mentioned that DRLs can diminish their lifespan. This is why I decided to try the GE Nighthawks.
So far the Nighthawks appear much brighter and whiter on the road than do the bluish Silverstars.
Has anyone else tried these bulbs? What have been your experiences?