De reactie van Philips Dear Sir/Madam, Thank you for your mail. Older cars generally have a lower driving voltage compared to the more recent models. In older cars the average voltage is approximately 13.2V, and in those cars the lamps make their expected life in about 99% of all cases. Newer cars have a driving voltage of about 14.0V, mostly because of all the technological advancements like Air conditioning, sophisticated radio's, heated chairs, GPS etc. etc. This might be the reason the lamps are failing early in your car. Unfortunately Philips is obliged by law to produce to produce our lamps in such a way, that at 13.2V we have a certain lumen output. This is regulated by European law and every lamp manufacturer has to abide by these rules. All carlamps, also those of other manufacturers, are tested at 13.2V. Also the expected life is based on this voltage. The Philips VisionPlus and BlueVision car lamps use special technology which enables them to have a higher light output without changing anything on your car. Because of this higher light output they generally get a bit warmer than normal and therefore a too high voltage can cause the lamps to fail due to overheating. I hope I clarified for you why your lamps might have failed early. Philips can technically change the production process in such a way that our lamps can handle a voltage of about 14.0 or even higher, however European law prohibits us to do so. This because the lumen output at 13.2V would be less, causing them to be outside of European regulations. What you could do to get a longer lifetime out of these lamps is lowering the voltage in the lighting circuit in the car. This can be done by placing a resistor or wires with a higher resistance. Most garages/dealers say that a voltage of about 13.7V is "ok", for these lamps this is not the case. If you have your car voltage checked out please ask your dealer for the actual voltage. Voor mij geen philips meer moeten ze deze info maar vermelden op hun verpakking