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post #21 of 27 (permalink) Old 2nd November 2015
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Re: dirty head lights

as they say you learn some thing new every day could be a good tip for the sticky department
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post #22 of 27 (permalink) Old 2nd November 2015
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Re: dirty head lights

Originally Posted by Nottnoc View Post
...Consider what happens when a bulb blows & the glass shatters, doesn't happen often but it does happen....
Maybe I've led a sheltered life, but in all my years of owning cars I've never had that happen despite some of the headlights being suitable to house a Goldfish

If the bulb did explode I doubt the "Dirt" would be that bad unless the bulbs were exploding like fireworks


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post #23 of 27 (permalink) Old 2nd November 2015
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Re: dirty head lights

Must be a hole in the glue which would act as a gasket. And in turn let dirt past. But then he would also have that moisture problem.

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post #24 of 27 (permalink) Old 3rd November 2015
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Re: dirty head lights

Assuming that an '07 Laguna has polycabonate lenses and not glass, the interior 'dirt' could be UV damage from the headlight bulbs. My Clio II polycarbonate lenses suffer from the common dulled effect caused by exposure to UV but, unlike many others I've seen, it's mainly concentrated at the bottom of the lens and is in a roughly horizontal line. UV damage from the sun will obviously affect the uppermost surfaces the most. My upper surfaces (the indicator lenses) are the least affected and in addition to that, repeated polishing with a dedicated kit had no effect on the bottom section, yet it did wonders for the top section.

I read the hand book (for a separate reason) and saw it advised the use of anti-UV incandescent* bulbs. After switching the dipped beam lights on and looking at them directly, the cut off line for the beam aligns perfectly with the yellow, dulled section of the lenses at the bottom.

I never even knew there were 'normal' and anti-UV incandescent bulbs before this but can only assume someone has fitted normal bulbs for many years prior to my ownership.

Now I know I won't be able to polish out this hazy lower area unless I remove the lens in an oven, which I cannot be bothered to attempt. I'll stick to buying a new/good used set if they ever fail the MOT test through output reduction.

*I have no idea about any differences in gas discharge bulbs.
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post #25 of 27 (permalink) Old 5th November 2015 Thread Starter
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Re: dirty head lights

As Coventry said its not glass they are plastic, & he could be right. Its not dirt as such but dulled & grubby Looking so it could be uv damage. if so is it worth doing or just go down too the breakers yard & get some more Many thanks for all the input.
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