Re: Packard V8 in 57-58 Packards?
Posted by BigKev On 2010/5/31 12:34:13
I found this out on a "History of Headlights" wiki:
In 1940, a consortium of state motor vehicle administrators standardised upon a system of two 7 in (178 mm) round sealed beam headlamps on all vehicles -- the only system allowed for 17 years. A system of four round lamps, rather than two -- one high/low and one high-beam 5+3⁄4 in (146 mm) sealed beam on each side -- was introduced in 1957 by Cadillac, Chrysler and Nash on some of their car models in states that permitted the new system, and other American marques followed suit when all states permitted quad lamps in 1958. These lamps had some photometric advantages, particularly on high beam, but the primary advantage was the styling novelty permitted by the use of two small rather than one large lamp per side of the vehicle.
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