I know I’m not the only one who feels like I’m getting visually assaulted everytime I drive at night. It was bad 10 years ago but now, it seems like headlight manufacturers have a deal with insurance companies and optometrists to make the lights as bright as possible. Is this ever going to stop or is there some kind of race in the headlight industry to see who can reproduce the power of the sun first?
There was actually four different standard designs. You had the rectangular lights which came as either a 4x6" quad configuration, or the larger 5x7"design with one light on each side. Then there was the 5 3/4" round lights which were also a quad configuration, and the 7" round lights with one on each side. Prior to 1975 there was only the round designs and prior to 1958 when the quad 5 3/4" round light configuration were allowed, the only legal headlight was the 7" round design, which itself dated back to 1939.
The reason for the standardization in 1939 was that similar to today, every car had different designs in different configurations, though the main problem then was finding replacement lights when they inevitably burned out or got damaged.
The first car with composite headlights (in the US) was actually the Ford Thunderbird, but the Taurus is one everyone noticed.