It was in the second decade of the twentieth century that the electric lamp made its debut. However, this was not considered a marked improvement over lamps. While reliability improved, focusing the light on the road was a very big problem. This auto headlight assembly was considered as a safety risk because uncontrolled light would often create glare for the eyes of the driver coming from the opposite side. It is a sad truth that this continues to be the case even today.
As technology improved, more and more innovations took place and auto headlights became safer and more powerful. Tungsten lamps were used but were quickly discarded because the filament broke very often and required a lot of cleaning.