Interpretation ID: 1983-2.8

TYPE: INTERPRETATION-NHTSA

DATE: 05/17/83

FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA

TO: Sylvania GTE Products Corporation -- Ken Alexander, Engineering Manager

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. Ken Alexander Engineering Manager Sylvania GTE products Corporation 1231 "A" Avenue North Seymour, Indiana 47274

Dear Mr. Alexander:

This is in reply to your letter of April 8, 1983, following a conversation with Mr. Vinson of this office, with reference to Standard No. 108 Lamps, Reflective Devices, and Associated Equipment.

You are concerned with the "design to conform" language as it relates to headlamps, and have asked for an interpretation that it "does not mean that every lamp produced is required to have every photometric point in."

I am not certain what you mean by "every photometric point in." However, a manufacturer is expected to design his headlamps so that each will meet the minimum photometric output in candela set for the by SAE J579C for each test point. The agency does not pursue random occasional photometric failures at individual test points. But if a manufacturer's products show a pattern of failures to meet the minimum at any individual test point, the agency could consider this as an indication that the headlamp was, in fact, not "designed to conform".

I hope this answers you question.

Sincerely,

Frank Berndt Chief Counsel

April 8, 1983

Dear Sirs:

This letter is a follow-up to a conversation that I had with Mr. Taylor Vincent of your office.

As I explained in my conversation, we are a major supplier of halogen headlamps to the automotive industry, both domestic and overseas. We are currently engaged in discussions with one of the major auto makers in Japan, with purpose of us supplying headlamps for the cars that they export into the U.S. The Japanese have a lot of trouble in understanding your rules and regulations, and I have spent a lot of in trying to explain them. What I need the help of your office in is the following. I have gone over in detail with them the parts of FMVSS 108 that relate to photometrics of headlamps. I have explained that the references to SAE J579 is to a "design to conform" standard and does not mean that every headlamp produced has to have every photometric point in. I continued that the headlamp suppliers are reputable companies that have shown due regard in making their headlamps the best possible product, give the constraints of manufacturability; and that this is recognized and accepted by the federal government. Although they seem to understand what I am saying, they have asked me to obtain a supportive statement to this effect form someone within the regulatory agencies.

I understand the most acceptable way of doing this is to send you a brief statement of the above interpretation, from which your office can give a formal note of acceptance and agreement. I have attached same, and would appreciate very much the above mentioned action by your office in as short of time as possible.

I realize these are busy times and am sorry to have to add to your schedule, but our potential Japanese customers are insistent on us getting this not of agreement.

Thank you very much for your help and consideration.

Ken Alexander Engineering Manager KA/rb Attachment