科学素养与生活应用·英语30篇（2）

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LED灯泡为何更耐用且耗电更少

LEDs produce light through electroluminescence—sending electrons through semiconductor materials.
No filament heats up, so almost all energy converts to visible light instead of wasted heat.
A typical 10-watt LED delivers the same brightness as a 60-watt incandescent bulb.
Because they lack fragile glass and filaments, LEDs withstand vibrations and frequent switching.
Most last 25,000 hours—over 20 times longer than traditional bulbs—cutting replacement costs.
Dimmable LEDs work with modern switches, though compatibility depends on driver circuit design.
Cooler operation lowers fire risk and reduces air-conditioning load in warm climates.
Recycling programs exist for LEDs, but their long lifespan delays e-waste accumulation significantly.