Product Description

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 of the vehicle, was introduced on some 1957 Cadillac, Chrysler, DeSoto, and Nash models in states that permitted the new system.[17] Separate low and high beam lamps eliminated the need for compromise in lens design and filament positioning required in a single unit.[20] Other cars followed suit when all states permitted the new lamps by the time the 1958 models were brought to market. The four-lamp system permitted more design flexibility and improved low and high beam performance.[21][22][23] Auto stylists such as Virgil Exner carried out design studies with the low beams in their conventional outboard location, and the high beams vertically stacked at the centerline of the car, but no such designs reached volume production.