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retrieved for gencoupe OP AdR

Here's the most important part of the information:

Originally Posted by DOT APPROVED HID KIT and BULBS
It is a common misconception that "DOT Approved" means "Street Legal", in the same way that it is a common misconception that the higher the "Kelvin Temp" the "Brighter the Color".

The Truth is:

Higher Kelvin Temp (k) = Deeper color and less visible light output.

On that note, please understand that contrary to common practices by devious HID dealers to pass off DOT Approved as "Street Legal", what it really means is:

Inspected by the Department of Transportation and Approved to be safe to install in your vehicle.

This means that a truly DOT Approved HID Bulb or HID Kit is not going to cause dammage to your vehicle. It does NOT mean that it is street legal.

In order to not only stay safe, but avoid tickets, it is best to stick with a 6000K to 8000K light output. Other colors resemble emergency vehicles too closely and may result in a ticket. Specialty colors such as deep blue, and purple, are for show and sport only...

Although you can and probably will install a set of DOT approved HID Bulbs or HID Kit in your vehicle without ever being bothered by the law (as long as you stick with 6000K to 8000K), your headlight setup will still not be truly "legal".

In order to be truly legal you would need to take the following steps.

1: If your vehicle does not already have an HID compliant headlight housing, you will need to upgrade or change the housing over to an HID compliant housing.

2: Install a converion kit in your vehicle that uses HID bulbs in the "White" to "Baby Blue" light spectrum such as 6000K to 8000K.

Lighting regulation in the US and worldwide:
If you want to read more of this regulation: Headlamp - Headlamp - Wikipedia, the free encyclopedia

Originally Posted by Headlamp - Wikipedia, the free encyclopedia

Vehicles equipped with HID headlamps are required by ECE regulation 48 also to be equipped with headlamp lens cleaning systems and automatic beam levelling control. Both of these measures are intended to reduce the tendency for high-output headlamps to cause high levels of glare to other road users. In North America, ECE R48 does not apply and while lens cleaners and beam levellers are permitted, they are not required; HID headlamps are markedly less prevalent in the US, where they have produced significant glare complaints. Scientific study of headlamp glare has shown that for any given intensity level, the light from HID headlamps is 40% more glaring than the light from tungsten-halogen headlamps.

Last but not least, right out from SEMA's website the NHTSA final law interpretation and ruling:

NHTSA Lighting Rule: SEMA is urging the National Highway Traffic Safety Administration (NHTSA) to withdraw its final interpretation of the federal lighting rule that effectively bans previously legal headlamp replacement systems. NHTSA proposed the controversial interpretation last year and completed action this past October. Under NHTSA's new policy, replacement headlamps must comply with all applicable photometry requirements using the same light source as the OEM equipment. For example, the rule would now prohibit replacing a halogen-based system with high intensity discharge (HID) headlamps that otherwise meet all requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 108. In its Petition for Reconsideration, SEMA challenged NHTSA's authority to issue a rule that failed to comply with long-standing policy of basing federal safety standards on performance rather than design criteria. SEMA also contended that NHTSA engaged in an illegal rulemaking procedure. SEMA requested that NHTSA suspend enforcement of its lighting rule interpretation pending final consideration of the petition.

-Regards and happy modding."

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