Re: Auto Lighting thread : Post all queries about automobile lighting here Quote:
Originally Posted by a4anurag Here's what I think: "Materials used for the headlight casings". May be the compatibility or long term weather effects aren't in-synch with the Indian environment so ageing takes place faster!! Could this happen?
I am NOT saying that it is lower grade materials used but the materials used aren't 'right' for our type of conditions. |
Not likely. I did some digging and here is what I found: https://www.cargurus.com/Cars/l-Used...ting=166128441 https://www.cargurus.com/Cars/l-Used...ting=154787139 https://www.truecar.com/used-cars-fo...-bmw-7-series/ https://www.cargurus.com/Cars/invent...ting=178953718
These headlights don't fare any better in cooler and cleaner climate conditions. And some of these cars are just 3-4 years/40k miles old. Quote:
Originally Posted by audioholic This can only be analysed on a case to case basis. Firstly, headlight damage can occur due to various reasons: - Cracking due to excess heat/prolonged usage/upgraded bulbs
- Yellowing due to poor quality bulbs which dont have UV block glass, due to exposure to heat and sunlight
- Dust accumulation due to improper sealing of the dust caps after bulb replacement
- Pitting due to sand particles as explained previously
- Oxidation and fading due to improper cleaning techniques
- Aftermarket replacement headlights which are made of poorer quality lens and reflectors
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This was helpful. My assumption had been that a typical premium car would be cleaned regularly and maintained diligently with OE spares. And somehow I observed this issue to be consistent in 75% of all the premium cars I have come across and which are more than 3-4 years old. Hence my post earlier. Quote:
This had made it look faded and had a smoked effect.
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Exactly what I observed. Refer the post below where a BHPian had to change the headlight cover for >50k km run, 8 yr old BMW. http://www.team-bhp.com/forum/test-d...ml#post4270997
Another one, SRK's 5 yr old 740li which has run <40k kms. http://www.cartoq.com/shahrukh-khan-...inds-no-buyer/ Quote:
Second issue I have commonly seen is the yellowing and fading of assemblies, which is prominent with aftermarket replacement assemblies. My neighborhood has a lot of such cars where the headlight assembly was damaged and instead of paying a high cost at the dealership, the owners have opted for cheaper alternatives. These cars have shining OE headlight assembly on one side, and a yellowed and faded assembly on the other.
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Very valid point. Going for cheaper spares could lead to early deterioration. But could it be true for a vast majority of the premium cars? Well, we can only come to know after checking their service record. Quote:
Forget premium cars, you can see even some Maruti cars with faded lights, while some others look brand new. My car has shining headlights after 8 years of use with Phillips 100/90, but I have seen a lot of SX4 with dull and yellowed headlights. Hence, you cant narrow down this issue to a certain cause since there are multiple causes of this issue.
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Agreed. The yellowing of headlamps, somehow, is more frequent and prominent for certain car models compared to the rest. SX4, 1st gen Swift, Dzire, A-Star, Fiesta, Figo, Vista, Winger, Xylo etc. This could because the OE headlights are weak, owners go for after-market bulbs which spoil the reflector and the cover.
Also the smoking of the headlights is seen on slightly old cabs. Could it because they are driven in traffic and exposed to smoke constantly but the lamps are not washed regularly? Or some other reason?
Last edited by ashis89 : 21st September 2017 at 10:06.
Reason: Multi-quote
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