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Headlight construction ?

 
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Old 04 Nov 2018, 04:21 pm
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Location: Chalfont, PA
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Default Headlight construction ?

Just ordered a pair of 9006XS LED 4sided headlights, and I was in the driveway preparing my headlights with the 3M headlight renewal kit (which by the way is GREAT for removing haziness and yellowing), and I got to looking at the inside of the headlights. The low beam has this 'cap' like thing that is part of the headlight and goes over half the bulb......what would happen if I found a way to push this thing down, and out of the way of the bulb? Seems to me, a 4 sided LED bulb is loosing half of the effectiveness with this 'cap'.
PS, Replacing the 9006 is a timely pain in the ___, is there a better way to know if the bulb is 'seated', replacing the 9005 is just ridicules.

Last edited by red98gt; 04 Nov 2018 at 04:26 pm.
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Old 04 Nov 2018, 05:10 pm
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Location: Caerphilly, South Wales
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Default Re: Headlight construction ?

The 'cap like' thing is what makes it a low (dipped) beam headlight, it prevents the glare to oncoming drivers. If you removed (or adjusted) it you would just have another main beam working on the low beam setting. Certainly not allowed in the UK and almost certainly not anywhere else either.
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Old 04 Nov 2018, 05:53 pm
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Default Re: Headlight construction ?

Yep. As Alphie said, it helps prevent glare for oncoming traffic. But since the 9006 bulbs already have a silvered tip, it likely wouldn't increase the glare too much. Some cars use the 9006 without a cap made into the assembly and they seem to do fine.
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Old 05 Nov 2018, 03:39 am
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Default Re: Headlight construction ?

When I went LED bulb for low beam I bought ones with the "lens" on the end. I knocked the cap out with screwdriver and got it out with a bit wire with a blob of Plumbers Mait on the end of it.

Not had any "Flashes" and the TuV either didn't notice, or give a fug. Have to say lighting is better, but then with new bulbs that would hopefully be the case anyway.

The way the light "throws" (low beam or high beam) is more a matter of the reflector design / angle than the bulb or any shroud/cap

Tom's (Alfie's) point about the UK is probably valid in the UK since low beam light reflectors are tuned to point kerbwards, so glare may be more of a problem..?

On the European mainland, lights point straight ahead on dip, so they may be designed to point downwards rather than sideways - hence no glare..?

Either way - I like light, so I knocked them out.
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Old 05 Nov 2018, 11:26 am
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Default Re: Headlight construction ?

Hey thanks for the replies. Question for SinBad, is this 'Cap and Stem' just made for plastic, and will snap off, or is there metal in it?

Last edited by red98gt; 05 Nov 2018 at 11:35 am.
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