In 1962 a European consortium of bulb and headlamp makers introduced the first halogen lamp for vehicle headlamp use, commonly known as the H1, which is 12v 55watt P14.5s. Shortly thereafter headlamps using the new light source were introduced in Europe.
There was no requirement in Europe for headlamps of standardized size or shape, and lamps could be designed in any shape and size, as long as the lamps met the engineering and performance requirements contained in the applicable European safety standards.
Vehicles would have a Low Beam, which was designed to give a distribution of light forwards and laterally, but they were designed to limit the amount of light directed at oncoming road users
The High Beam would be designed to give a bright centre-weighted distribution of light, and not be too concerned with the amount of light directed at oncoming road users