Development of high power, high intensity, surface mount white light LEDs has led to widespread adoption of this semiconductor as a light source in homes, traffic signals, decorative lighting, commercial spaces, automobile headlights and spot lighting. High power LEDs are the most efficient in terms of durability and light output but one drawback is that they dissipate a lot of heat. Metal backed PCB assemblies are commonly used to mount surface mount power LEDs where the metal works as a heat sink. The metal backing protects the LED, the board and other components from excessive heat buildup and premature failure.
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