Originally posted by omegabenz
I am pretty sure they are the same. How are they different?
Omega, the following is from suvlights.com
What is the difference between the Sylvania Silverstar and the Osram Silverstar?
Osram Sylvania is one and the same company, within the US they use both Osram and Sylvania, outside the US its Osram. The Osram Silverstar is a clear bulb with Xenon gas boost to increase brightness up to 50% color is similar to standard halogen though it is slightly whiter. The Sylvania Silverstar is the same bulb but with an amethyst blue coating with 30% more light than standard halogen and 4000K light color which is comparable to Xenon/High Intensity Discharge Light Systems as seen on high end cars from Acura, Audi, BMW, Cadillac, Lexus, Mercedes Benz, Porsche to name a few.
Sylvania Silverstar is currently available in 9003/H4, 9004, 9005, 9006, 9007 & sealed beam sizes, the Sylvania Silverstar is the Super White (blue/grey coated) version of the Osram Silverstar (clear) which is available in H1, H4, & H7. Osram Silverstar color is slightly whiter (very slightly) than regular halogen. We also have the Narva Range Power Blue bulbs are made in Germany and DOT compliant. The Osram Silverstar is E code (ECE Reg 37) but not tested for DOT compliance (FMVSS 108) since the bulb is made for the European market, but most likely meets US DOT standards if tested. All these bulbs are stock wattage so it will not have any effect on wiring.