Worldwide about 20% of all electricity generated is used for lighting.
世界范围内有20％的总发电量被用于照明。
With lighting accounting for some 20% of electricity use worldwide, switching to a more efficient system could both save energy and reduce emissions of climate-changing greenhouse gases.
照明用电约占全球用电总量的20%，改用更高效的照明灯即节能又减少了温室气体的排放。
About 1.6 billion people worldwide are without access to electricity and have to rely on fuel-based sources for lighting.
全球大约有16亿人生活在没有电力只能依赖矿物燃料光源的环境中。
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