Lighting accounts for about 7% of the total electricity consumed in the US. Since lighting is often far removed from the power source—such as the distance from a power plant to street lamps on a remote highway—a lot of energy is lost during transmission.

在美国，照明约占总耗电量的7%。由于照明通常远离电源——例如从发电厂到偏远公路上的路灯——因此大量的能源在传输过程中会损失掉。

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In higher-temperature climates, for example, the cost of installing and running the air conditioning necessary to properly cool the lead acid batteries can represent up to 50 percent of the total power consumed at each cell tower site.

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