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New bulbs smoking

akiiraja96

Member
Joined
Oct 25, 2023
Messages
40
Location
Manchester
Car
C class w204
So I got these replacement led h7 bulbs for my w204 c200 cdi blue efficiency se. I got them off eBay. I wanted some 6000k bulbs to replace the original so the light is white however I put them in and when I switched the lights on there's smoke coming out of the bulbs.

Am I doing something wrong?
 
Link to product ?

And what do your headlights look like ?
 
So you've a pre facelift W204 with a projector dipped beam that you've put 100W H7 halogen bulbs in .

100W is your issue as the wiring is for 65W.
 

Part number for headlight is a2048208561

Regards
The lamps that you have linked to have an envelope made from quartz.
Quartz is used because it has a far superior heat resistance compared to normal silicon glass.
However quartz is less stable, and has a more porous surface.
If you touch the lamp with bare hands, residue or even grease from the natural oils in your skin can adulterate the surface.
When the lamp is then used, that residue will burn from the extreme heat. Not only does this produce smoke, but it damages the lamp where the deposit was left, causing a "hot spot" and often leading to premature failure.
Hth
 
So I got these replacement led h7 bulbs for my w204 c200 cdi blue efficiency se. I got them off eBay. I wanted some 6000k bulbs to replace the original so the light is white however I put them in and when I switched the lights on there's smoke coming out of the bulbs.

Am I doing something wrong?
They are not LED, it clearly states they are halogen, plus, as others have pointed out they are 100 W so they will draw nearly twice the current as the original bulbs and are over loading the wiring etc.

Plus at 100 W they are illegal for road use and, at £7.99 for 4 are most likely to be of very poor quality.

Throw then away and fit Osram Night breaker or equivalent.
 
The lamps that you have linked to have an envelope made from quartz.
Quartz is used because it has a far superior heat resistance compared to normal silicon glass.
However quartz is less stable, and has a more porous surface.
If you touch the lamp with bare hands, residue or even grease from the natural oils in your skin can adulterate the surface.
When the lamp is then used, that residue will burn from the extreme heat. Not only does this produce smoke, but it damages the lamp where the deposit was left, causing a "hot spot" and often leading to premature failure.
Hth
Thanks. So what is the solution
 
They are not LED, it clearly states they are halogen, plus, as others have pointed out they are 100 W so they will draw nearly twice the current as the original bulbs and are over loading the wiring etc.

Plus at 100 W they are illegal for road use and, at £7.99 for 4 are most likely to be of very poor quality.

Throw then away and fit Osram Night breaker or equivalent.
Thanks. What watt should I look at?
 
Thank you. Are these a good choice?


Can I use the same bulbs for dipped?

Thanks
They are standard light output. Th

I thought you wanted a whiter light? They are more toward the blue spectrum.

Look for Osram Night breaker.

They are the correct wattage but have a much better light output (and tend to be whiter) and are a direct replacement.

Are your dipped and main bulbs both H7?
 
Don't mess about with dodgy non legal bulbs. You have had good sound advice in previous posts, fit the correct bulbs and then you will not dazzle other road users.
 
Thanks. So what is the solution
If a quartz lamp has been inadvertently handled, or otherwise soiled, it can be cleaned off with pure alcohol (cleaning alcohol). However this cleaning must be performed before the lamp is used.
As soon as the lamp is used with an adulterated surface, and that contaminant is burned into the quartz envelope, it is irreversibly damaged. The lamp may continue to operate for quite some time, but it will be effected & undoubtedly fail eventually.
 
A pre-facelift 204 has 4 x H7 bulbs so as stated above change all 4 to Osram Nightbreakers - I did that to mine years ago, they are much beter than the original bulbs, I have the dips on all the time and they have lasted pretty well. Osram come out with new varieties every couple of years, I've lost track of what is the latest variety, I think I have Nightbreaker+ and Nightbreaker Laser in mine.
 
Thanks. What watt should I look at?
Wire them through a relay if you are intent on 100W - but only for mains - never dipped.
I don't go near the supposedly brighter 55W bulbs as they are far too frail. 100W through a relay is reliable and as mentioned, wash the bulb if you as much as glance a finger on its surface.
 
So I got these replacement led h7 bulbs for my w204 c200 cdi blue efficiency se. I got them off eBay. I wanted some 6000k bulbs to replace the original so the light is white however I put them in and when I switched the lights on there's smoke coming out of the bulbs.

Am I doing something wrong?
Apart from touching them the only thing you did wrong was buying a pos unbranded product from ebay (a greater selection is also available at Amazon and Alibaba) with double the power consumption that your car is designed for and then expecting it to work.
You've had a lucky escape the consequences could have been much worse.
Stick to known brands at 55 watt.

www.powerbulbs.com is highly recommended - go straight to a good UK supplier instead of exporting cash to the US
 

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