As an example: The axis of reference for lamps mounted on the front and rear of a vehicle is the longitudinal axis of the vehicle.ĥ. CENTROID OF A LENS AREA: The geometric centroid of a plane area which is perpendicular to the axis of reference of the vehicle and upon which the projection of the functional lighted lens area falls. BULB: An indivisible assembly which contains a source of light and which is normally used in a lamp.Ĥ. Rated bulbs shall be seasoned at rated voltage for 1% of their design life or 10h maximum.ģ. ACCURATE RATED BULB: A seasoned bulb operated at design mean spherical candlepower and having its filament (s) positioned within ☐.25 mm, and with its pins oriented within ±5 deg, of nominal design positions. SCOPE: The following are definitions of common terms used in SAE Standards and Recommended Practices pertaining to motor vehicle lighting.Ģ. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.Ĭopyright 1988 Society of Automotive Engineers, Inc. SAE J387 NOV87 Terminology-Motor Vehicle Lighting END OF PREAMBLE (NOT PART OF THE STANDARD)Ī Product of the Cooperative Engineering Program Is the right of all humans to know and speak the laws that govern them. This legal document is hereby made available on a noncommercial basis, as it
In order to promote public education and public safety, equal justice for all,Ī better informed citizenry, the rule of law, world trade and world peace, Terminology-Motor Vehicle Lighting PREAMBLE (NOT PART OF THE STANDARD)
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