While the vision H4 does not turn night into day, but actually brings much more light than the standard lamp and hence more safety.
I also have a car with xenon light and find the difference from this lamp is no longer so great. Even if the vision should hold only 6 months, the exchange would have been worth it for me. Can recommend genuine, for all the safe in low light conditions on the go should be, or even want this lamp.
----------------------------------
Addendum September 2013
A lamp has now the "temporal blessed" that she would be replaced by the slightly more favorable Bosch Autolampenset H4 Plus +90, double box. But all that Philips was a very good bulbs in all.
