the LED is a key to its growing popularity

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Several trends have boosted the popularity of these electronic lights, according to automotive engineers. A few LED products now offer 50 lumens/W – in some cases as much as 100 – whereas many products a few years ago offered less than five. Additionally, electric vehicles and hybrids need power-efficient lighting, which boosts the appeal of LEDs. Meanwhile, the cost of LEDs has gradually dropped over the last five years.Less than 2 percent of headlights are estimated to use LED technology today. But suppliers say that more than 80 percent of Asian cars use LED-based CHMSLs. Similarly, more than 70 percent of European cars and about half of North American cars are employing LED-based CHMSLs. On the exterior of the vehicle, LEDs are also used in daytime running lamps and parking lights, as well as the high- and low-beam headlights.

Tier-one suppliers say the design flexibility of the LED is a key to its growing popularity. LED packages can be altered to incorporate different numbers of chips, as well as different shapes and sizes. Automakers such as Cadillac, for example, have used that flexibility to create unusually shaped CHMSLs and tail lamps.In that sense, LEDs are helping automakers create greater brand awareness, in the interior, as well as the car's exterior. yaham, for example, has rolled out LEDs of various colors – including ice blue, blue lagoon, sky blue and blue green – which enable automakers to tune the interior color to match their brand. In an even bolder step, Ford is employing the technology in MyColor, a system that allows drivers to change the interior colors to match their moods.