Headlights

[Italux]

The inner lens is necessary to correctly distribute the light. Otherwise you risk dazzling cars traveling in the opposite direction.

[particlewave]

Originally Posted by Italux

The inner lens is necessary to correctly distribute the light. Otherwise you risk dazzling cars traveling in the opposite direction.

Incorrect. There are plenty of cars that use smooth reflectors without a diffusing lens.
Yes, it will pass inspection as they are not required.

Example: this Volvo S80 in my driveway uses a halogen bulb with a smooth reflector and no diffusing lens.



Read up on DOT lighting regulation and show where it says a diffusing lens is required.
(Hint: it doesn't )

[Italux]

Yes, but in that case it has been studied at the origin and the manufacturer worked on the parabolas to get the correct light distribution.
Why put that inner lens if not necessary?

[particlewave]

Originally Posted by Italux

Yes, but in that case it has been studied at the origin and the manufacturer worked on the parabolas to get the correct light distribution.
Why put that inner lens if not necessary?

I have personally removed inner lenses on a couple dozen sets of 986/996 headlights and the owners have had zero issues with glare or "dazzling" and all pass inspection. What is your experience with these headlights?
With all of the cars on the road with misaligned headlights or HID bulbs haphazardly thrown into halogen reflectors, I wouldn't worry about any potential extra glare from a halogen without a diffuser (which isn't an issue, anyway).
I'll say it one last time: it's not necessary. Period. End of discussion.

I have one halogen headlight remaining on my workbench. Someday soon, I'll take comparison shots with and without the inner lens for anyone curious (maybe even video), but I won't debate it. Actual experience beats ill informed speculation every time.

[Italux]

Originally Posted by particlewave

I have one halogen headlight remaining on my workbench. Someday soon, I'll take comparison shots with and without the inner lens for anyone curious (maybe even video), but I won't debate it. Actual experience beats ill informed speculation every time.

That's would be much interesting. Just stand in front of a wall at night and see the difference with or without inner lens.