科学素养与生活应用·英语30篇（3）
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Why We Use LED Lights
为什么我们使用LED灯
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LED lights use much less electricity than old bulbs.LED灯比老式灯泡耗电少得多。
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They last many years without burning out.它们可使用多年而不烧坏。
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They stay cool while giving bright light.发光明亮却保持低温。
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LEDs work with low voltage and little heat.LED可在低电压下工作，发热量小。
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They fit in small spaces like phones and watches.它们体积小巧，适用于手机和手表等狭小空间。
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Red, green, and blue LEDs make full-color screens.红、绿、蓝三色LED可组成全彩显示屏。
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Using LEDs saves money and energy.使用LED既省钱又节能。
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They help lower carbon emissions worldwide.它们有助于全球降低碳排放。