Light-emitting diodes, more commonly known as LEDs, are revolutionizing functionality and styling of automotive lighting.

The technology, once found only on luxury cars, is becoming standard on many headlamps and taillights of mainstream vehicles to set them apart from the competition. The increase in usage comes as the price of LEDs declines and automakers are finding new ways to use them.

"It's becoming ubiquitous," said Ralph Gilles, Fiat Chrysler Automobiles North America senior vice president of product design. "Everybody is slowly but surely transferring to LEDs."

And with that transition, even more radical lighting advances could be coming to U.S. highways: Headlight systems linked to radar and cameras eliminate the need to dim high beams for oncoming cars — and can even see a child on a bicycle and direct light in that direction.

Most, if not all, of the new models showcased at the 2015 North American International Auto Show incorporated LED lighting — from the Ford GT and Acura NSX supercars to the 2016 Chevrolet Volt and 2016 Hyundai Sonata Hybrid.

LED lights are smaller, the strips are bendable and they use less energy than traditional halogen bulbs. For example, two LEDs can be formed and fitted to project a smooth line for daytime running lights or in groups to illuminate large areas such as taillights.

Styling, according to David Hulick, marketing director of lighting manufacturer Osram Sylvania, is the main reason driving the LED revolution, followed by functionality and durability.

The Dodge brand's newest rear racetrack-style lighting — a continuous signature glow across the back of the vehicle — is done by using individual LEDs blended to form one seamless ribbon of glowing red light.

About five years ago, Gilles said the company made LED lighting a priority for all of its new and redesigned vehicles. Nearly every vehicle in the automaker's lineup, from the under-$20,000 Dodge Dart to its highest-end models, has the advanced lighting.

"It's really proliferated," Gilles said. "But our designers are enjoying it. They're getting better at it. … We keep inventing on the fly."