OSRAM illuminates whiter ...

... Or else it's CREE LED or Xenon. Fortunately they have a UV coating unlike other. The polycarbonate appreciate my headlights.
Approximating the color temperature of daylight (midday sun), they improve for me the perception of relief and depth of field (and not a placebo effect ;-D)

In this way, I do not quite see why these bulbs are supposed to be "Off-road".
After all, they are in the absolute least that dazzling leds daytime running lights and far less than the xenon. Their power (55w) does not also exceed the legal maximum road ... their remaining scope equivalent to Philips "Blue Vision".
A tip com '?

For durability, we need to see. This is often the weak point of such - expensive - blue bulbs.