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All H.I.D. (High Intensity Discharge) components sold on this site are strictly regulated for the following purposes only - provided that it is legal to do so:

  • OEM automotive replacement
  • Off-road, show and track automotive use
  • Consumer & commercial illumination (indoor or outdoor)
  • Horticulture (freshwater & brackish plants)
  • Aquaristic (macro-algae & coral reef)
  • Laboratory / educational research
  • Medical, dental & other professional applications
We at Sigma Automotive, Inc. do not condone any illegal use of HID conversion kits. You must check with your local authorities for specific information before purchasing or using any HID components.

In a recent NHTSA's response to an HID conversion kit vendor, it says:

"...The kit that you furnished us appears to be designed to replace an H1 replaceable light source, ... The first part is labeled "HID Bulb Set" and contains two replaceable light sources... The second part is labeled "HID Driver Unit" and contains a ballast, an ignitor, a relay, and adapters to convert the motor vehicle’s wiring harness to be compatible with the HID conversion kit.

Based on a review of the H1 light source specification filed in the Part 564 docket (#3397), it is apparent that this is a significant redesign of the H1 light source. At the most basic level, an H1 light source incorporates an incandescent filament in which light is produced by a metallic wire coil heated to incandescence by an electrical current, whereas the HID conversion kit’s light source incorporates a discharge arc to produce the light and requires a ballast for operation. Thus, in order to comply with paragraph S7.7 of FMVSS No. 108, your light source must comply with, inter alia, the dimensional specifications for the metallic wire coil filament size and location, the electrical connector size and location, and the ballast would need to be a design currently on file for use with an H1 light source. Complying with the dimensional aspects of the H1 light source appears to be an impossibility considering that the wire coil filament and the electrical connector are not a part of your design. Furthermore, there are no ballast designs on file for use with an H1 light source. Thus, your company’s HID conversion kit is not a design that conforms to the Standard and could not be certified as complying with FMVSS No. 108...

This interpretation would apply to any HID replaceable light source whose base was modified or manufactured to be interchangeable with any regulated headlamp replaceable light source that incorporates an incandescent filament design...."

  • For full and unedited thread, please click here

    SEMA responds in a letter issued by its General Counsel Russ Deane (with all credits go to jeffs13 at

    He stated that this design based standard is illegal and cited the Motor Vehicle Safety Act and the 6th Circuit Court's decision in Chrysler Corp v. Dept of Trans. If the automobile manufacturers are held to a minimum standard based on performance, then why are the aftermarket lighting manufacturers held to a design standard, that any bulb retrofitted into an existing halogen housing must be halogen as well?

    Furthermore, both of Cadillac and Nissan's HID options do not include the housing being changed out on the vehicle when HID capsules are used. Cadillac stated that the only thing that changes when the HID option is purchased is the bulb, and the external housing wiper, but that the housing is the same one. So the auto manufacturers are doing the same thing the aftermarket is doing - retrofitting HID bulbs into halogen housings, has NHTSA initiated Compliance Investigations in regards to these two companies? If not, why not? They are putting a lot more HID on to the public highways than any aftermarket HID company.

    In regards to the disclaimer "For Off Road Use Only", NHTSA states that this disclaimer cannot be used by automotive lighting manufacturers for bulbs or HID that can be used on vehicles capable of being driven on public roadways. But it is a fact that other industries use the disclaimer "For Race Use Only" for products that are also able to be used on cars on public roadways, but how can that be acceptable in those other industries? Or does NHTSA not have the time to pursue it? Another example, aftermarket steering wheels also fall under this category and that the installer is responsible if an air bag is disabled. Why is this same standard not applied to HID lighting? Other industries are allowed to manufacture or import non complying products that are capable of being used on vehicles on public roadways, but according to this thread NHTSA eithers turns a blind eye to it, or places the burden on the installer. This seems to be another double standard being applied to the aftermarket lighting industry. Once again, someone is allowed to do something that NHTSA is telling the HID retrofitters they are not allowed to do.

    By proceeding, I agree that:

    1. I have read ALL text and have visited ALL related external links presented on this page
    2. I will use HID components ONLY on the suggested applications as stated at the beginning of this page; provided that it is legal to do so
    3. I realized that HID components may not be legal for use on public roads / highways and I will check with my governing agency for specific information before purchasing
    4. I am aware of the legality and liability issues associated with the purchase/use of HID components
    5. I am liable for any injuries or accidents suffered by the user or any other party associated with the use of HID components
    6. I am liable for any potential penalty as a result of using HID components

    I agree:

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