From Experience Silverstars tend to fail much faster than OEM or other standard bulbs. Went through a couple of pairs in just about a year.
FWIW, They were a little cleaner though, produced a nice light.
'13 TiAg over Coral, 335is | DCT | Prem | L7 | Nav/Idrive | CA | 19" "-------"
A BMW is Just a Car, it doesn't make you smart, handsome, cool, or wealthy. Get over it.