I was looking at the Osram (Euro) Silverstars earlier. I found that the Osram models have a different gas and have a higher pressure. The combination of the two produces a brighter lamp. The Sylvania (US) Silverstars are the same bulb, but they have a blue coating to bump their color temp from the normal 3200K up to 4000K (HID temp).
The blue coating does hinder the output slightly, but the different gas and the higher pressure still allows the bulb to create more light then a stock halogen.
And here is a $10 rebate towards a set:
Clicky!
Quote:
From osram.com
Question:
What does "SILVERSTAR" mean in connection with headlamps? ?
Answer:
The successful technology of the "SUPER" - lamps was developed further. The luminance has been optimised in view of modern headlight systems. The effect: up to 50% more illumination (in comparison with the standard version) in 50m - 100m in front of the car and a longer illumination of 20m, a real Plus of security.
In addition for the first time the H7 has been designed with a silver cap.
This lamp generation fits harmoniously into the shiny look of modern transparent headlamp modules.
