How do lights in digital radios / alarm clocks / keyboards / etc, stay on for years and years without ever burning out?
In: Technology
They’re normally not driven very hard. The LED in a modern flashlight, or indeed car headlamp will have quite a short life in the grand scheme of things. Longer than an incandescent bulb, but LEDs do dim over time, and wear out if they get hot a lot, which a powerful one will.
The LED that tells you whether your Num Lock is switched on is relatively speaking, very dim, and low power, and will run for decades without a problem.
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