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Car Forum / BMW Cars / November 2008xenons
I have just replaced the front right xenon light bulb on my e60 BMW. And after I turned on the lights it was obvious that the light wasn't blue but rather bright yellow? Now, the seller convinced me that the xenon bulb is the same as before and that it will turn to blue after some 100 hours of operation??? Has anyone any knowledge of this because it really seems rather suspicious to me. Thanks Sounds flaky to me too. >I have just replaced the front right xenon light bulb on my e60 BMW. And >after I turned on the lights it was obvious that the light wasn't blue but [quoted text clipped - 3 lines] >rather suspicious to me. > Thanks >I have just replaced the front right xenon light bulb on my e60 BMW. And >after I turned on the lights it was obvious that the light wasn't blue but [quoted text clipped - 3 lines] >rather suspicious to me. > Thanks How much did you pay for the bulb? It lists for around US $200 from BMW. Tom K. > I have just replaced the front right xenon light bulb on my e60 BMW. And > after I turned on the lights it was obvious that the light wasn't blue > but rather bright yellow? Now, the seller convinced me that the xenon > bulb is the same as before and that it will turn to blue after some 100 > hours of operation??? Has anyone any knowledge of this because it > really seems rather suspicious to me. Where did you buy it? Replacements are available in a variety of colour temperatures. And should be marked what they are. There is likely to be a difference between a new and old one of the same colour temperature, though.  Signature*I don't work here. I'm a consultant Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. >I have just replaced the front right xenon light bulb on my e60 BMW. And >after I turned on the lights it was obvious that the light wasn't blue but >rather bright yellow? Now, the seller convinced me that the xenon bulb is >the same as before and that it will turn to blue after some 100 hours of >operation??? Has anyone any knowledge of this because it really seems rather >suspicious to me. I don't know about automotive xenon lamps. But I know about high power film projection xenon lamps, and they exhibit considerable change in color temperature as they age. Normally theatres that are running two projectors will replace both lamps at the same time because otherwise there is a noticeable difference in color temperature. The theatrical "kurzbogenlamp" xenons tend to look a little green when they are new and a little purple when they are old. HMI lamps are even worse in this regard. It is still possible you got the wrong color temperature lamp, but it is also quite possible that once the lamp ages a bit, the color temperature will rise somewhat. It's also possible that as soon as the color of that lamp starts to look right, the other one will fail... --scott Signature"C'est un Nagra. C'est suisse, et tres, tres precis." >>I have just replaced the front right xenon light bulb on my e60 BMW. And >>after I turned on the lights it was obvious that the light wasn't blue but [quoted text clipped - 9 lines] > projectors will replace both lamps at the same time because otherwise > there is a noticeable difference in color temperature. Yes, but yellow is colder than white or blue. If you expect a blue light and get yellow, this indicates that the new light is already cooler than the expected one. It should not get warmer with age, it should continue to get cooler still. > The theatrical "kurzbogenlamp" xenons tend to look a little green when > they are new and a little purple when they are old. [quoted text clipped - 5 lines] > will rise somewhat. It's also possible that as soon as the color of that > lamp starts to look right, the other one will fail... I agree completely with the idea that both lamps should be changed at the same time UNLESS they were both changed recently -- within a hundred hours or so -- and one has failed again. In this instance, I would take a shot at replacing only the failed lamp. In all other cases, I would replace both of the lamps together. Thanks for the answers. The bulb was the exact replacement for the old one I had on my car. And I saw them both with my own eyes so I don't think the temperature colour was wrong. It is not so visible at a glance but when you take a better look the difference is obvious. Maybe, as you say, it will change the colour temperature somewhat. Mario > Thanks for the answers. The bulb was the exact replacement for the old one I > had on my car. And I saw them both with my own eyes so I don't think the > temperature colour was wrong. It is not so visible at a glance but when you > take a better look the difference is obvious. Maybe, as you say, it will > change the colour temperature somewhat. > Mario Not sure if you are still watching this board but i am having the same problem with my Xenons. The BMW dealer told me that the bulb color would change over time. After about 300 hours my bulb is still not blue like the old one. When they took out the yellow bulb and put it in the opposite side ...tada the light turned blue. BMW thinks that what has happened is either the ignitor or module that controls the headlamp is bad and not producing enough power to run the xenon. DO diagnose take a look at the bad headlight and see if it is putting out a gold color...this is easier to do just before sunset. If the color is goldish while the other is BLUE WHITE then chances are you are having the same problem as me. Take the car to the dealer and have them put the bulb in the opposite side to be sure.....hope this helps. >Not sure if you are still watching this board but i am having the same >problem with my Xenons. The BMW dealer told me that the bulb color [quoted text clipped - 8 lines] >having the same problem as me. Take the car to the dealer and have >them put the bulb in the opposite side to be sure.....hope this helps. That's interesting. Again, with projection xenon lamps, it is very important to keep them operating at the rated current... if you back off on the operating current you not only change the lamp color but you dramatically reduce the lifetime of the lamp. It should be possible to get a clamp-on ammeter with a DC setting and measure the current being delivered to the two bulbs after starting and operating for a few minutes. The currents should be the same at all times, even if the lamps are different. The voltage will change; the power supply should crank the voltage up as the lamp ages in order to maintain the same arc current. If the currents are appreciably different, it is probably time to change that module. --scott Signature"C'est un Nagra. C'est suisse, et tres, tres precis." Thanks. I did all that bulb switching from left to right side and found out that approximately I get the same light on both sides with a same bulb. They also told me that these "igniters" are working fine. So the only thing left for me to do (because I didn't want my car to look like David Bowie :)) was to replace both bront bulbs. Now the light seems similar but is rather yellowish than white blue. One more thing, when I saw the old bulb not the broken one but the other that I replaced just to have equal light on both sides) it was clearly visible that there was something purple in the bulb. This didn't look as it was a different bulb when compared to the new one but rather that some purple deposit has build over there over time. That's how it looked to me. Thanks again for your advice. Regards, Mario On Nov 11, 2:04 pm, "Mario M" <mario.milino...@gmail.com> wrote: > Thanks for the answers. The bulb was the exact replacement for the old one > I [quoted text clipped - 4 lines] > change the colour temperature somewhat. > Mario Not sure if you are still watching this board but i am having the same problem with my Xenons. The BMW dealer told me that the bulb color would change over time. After about 300 hours my bulb is still not blue like the old one. When they took out the yellow bulb and put it in the opposite side ...tada the light turned blue. BMW thinks that what has happened is either the ignitor or module that controls the headlamp is bad and not producing enough power to run the xenon. DO diagnose take a look at the bad headlight and see if it is putting out a gold color...this is easier to do just before sunset. If the color is goldish while the other is BLUE WHITE then chances are you are having the same problem as me. Take the car to the dealer and have them put the bulb in the opposite side to be sure.....hope this helps. > Thanks. I did all that bulb switching from left to right side and found > out that approximately I get the same light on both sides with a same > bulb. They also told me that these "igniters" are working fine. So the > only thing left for me to do (because I didn't want my car to look like > David Bowie :)) was to replace both bront bulbs. Now the light seems > similar but is rather yellowish than white blue. Early HID systems were very much bluer than is the norm these days. Perhaps BMW have changed the spec of their replacements too. Signature*People want trepanners like they want a hole in the head* Dave Plowman dave@davenoise.co.uk London SW To e-mail, change noise into sound. |
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