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Old 01-05-2015, 06:58 AM   #1
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I have this same question too.

I believe I have the original OEM bulbs in my '98 base 986. My headlight assemblies are "like new" with no yellowing, scratches, etc. I keep them polished and protected.

I find my headlamps lacking and not as good as other cars.

Is it more of thermals or UV that causes the breakdown on these lenses?

Spending sleepless nights on the internets revealed that we should be using H7u bulbs which have a UV rating designed for polycarbonate headlight assemblies.

So, I would like to upgrade my bulbs from 1998 stock. I do not want to brown my lenses. I want to stay with the stock headlamps with minimal cost, so it will be a H7. My question is.. which one?

I discovered that the "night breaker" OSRAM. Various websites including Amazon state they are "UV safe" for plastic lenses.

NIGHT BREAKER UNLIMITED | Halogen headlight lamps... | OSRAM
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Old 01-05-2015, 07:20 AM   #2
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Quote:
Originally Posted by b55er View Post
Spending sleepless nights on the internets revealed that we should be using H7u bulbs which have a UV rating designed for polycarbonate headlight assemblies.
I don't think the outter reflector/lens have been manufactured in PC. Looks made out of PET or worst, no idea. Maybe something went completely wrong in the design/simulation/r&d process.... nobody knows for sure. The yellowing (burning in some case) issue is pretty weird that is for sure

Not a light wavelength or spectrum vs material expert at all here, but find it interesting to hear that you found a manufacturer adapting their bulbs (coatings?) for max performance. Never read that before, finally lol
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Old 01-05-2015, 07:26 AM   #3
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Thanks for making it easy for us to find btw UV filter technology | Professional knowledge | OSRAM

Nice find, thx for that
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Old 03-01-2015, 07:15 PM   #4
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Did we determine if these were a good alternative to increase out light output? I am not happy with how far up the road my lights shine at night.

Quote:
Originally Posted by b55er View Post
I have this same question too.

I believe I have the original OEM bulbs in my '98 base 986. My headlight assemblies are "like new" with no yellowing, scratches, etc. I keep them polished and protected.

I find my headlamps lacking and not as good as other cars.

Is it more of thermals or UV that causes the breakdown on these lenses?

Spending sleepless nights on the internets revealed that we should be using H7u bulbs which have a UV rating designed for polycarbonate headlight assemblies.

So, I would like to upgrade my bulbs from 1998 stock. I do not want to brown my lenses. I want to stay with the stock headlamps with minimal cost, so it will be a H7. My question is.. which one?

I discovered that the "night breaker" OSRAM. Various websites including Amazon state they are "UV safe" for plastic lenses.

NIGHT BREAKER UNLIMITED | Halogen headlight lamps... | OSRAM
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