Had previously Osram lamps (Night Breaker) installed, but they were not even broken after 6 months. That the life of things be lower than with "normal" light bulbs, even on the package. Since the normal but keep with me usually 4-6 years, I had hoped for so about 2 years!
The service life was determined not least so pathetic, since our car has a light sensor. Drive under a bridge? Light on. Driving through a tunnel? Light on. Drive through a particularly shady avenue? Light on. So the truck certainly makes 10-15 cycles per day. Without light sensor manually maybe 1 - 2. This makes determined from some.
Whether to keep the Philips Part longer remains to be seen. Skepticism is the reason for only 4 stars, the luminous efficiency convinced me so far and is absolutely felt in the field of Osram Night Breaker.
