The U.S. National Highway Traffic

Posted by sawek on July 28th, 2016

The U.S. National Highway Traffic Safety Administration stated that, "Nearly half of all traffic-related fatalities occur in the dark, despite only 25% of traffic travelling during darkness." Have you ever wondered why there are so many different types and styles of headlights? Advances in technology, ever changing demographic trends, and varying safety standards have spurred the transformation of the once elementary and simplistic headlight design into a plethora of different shapes, designs, and styles. With over 200 million motor vehicles on U.S. roadways everyday, chances are, you've seen just how different headlights can be. Today, headlight construction is based on one of two main standards; The ECE or the SAE. The distinction among the two standards is based upon three main criterions.

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The extent of allowable glare on other drivers 2. The least amount of light emanating down a straight away 3. The precise location and light levels of emanating beams The ECE is widely accepted by nearly every industrialized country outside of the United States. The SAE is unique in that it is the only standard that is mandatory in the United States and no where else. U.S. automotive lighting manufacturers began to focus on the strategy of balancing low power and efficient light, where as Europe manufacturers focused mainly on performance and maximum output. Due to the difference in safety standards and performance goals, the distinguished styling of headlights produced by the U.S. and countries outside of the U.S. vary heavily in design and features. So what specifically affects the performance of a headlight? There are two main factors responsible for lighting. 1. The optical systems which direct the light towards a focal point.

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