How Do LEDs Age? Shopping for LED Bulbs & Est. Lifetimes

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LEDs age primarily due to thermal stress, which can degrade the semiconductor materials over time, leading to reduced light output and eventual failure. Factors such as operating temperature, voltage fluctuations, and manufacturing quality significantly influence their lifespan. Common failure modes include junction overheating and delamination of the chip from the substrate. When shopping for LED bulbs, it's essential to consider the estimated lifetime provided by manufacturers, as this reflects the expected performance under typical usage conditions. Understanding these aging mechanisms can help consumers make informed choices when purchasing LED lighting.
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i'm shopping online for an LED bulb and one site gives the estimated lifetime of the LED.

So, i was wondering what exactly is happening to make the device "old" and no longer work?
 
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