Towards the end of the 20th century, the old-fashioned sodium street lights that made everything look orange were gradually replaced by high-pressure sodium lamps.
到20世纪时，让所有东西看起来都呈桔色的老式钠路灯逐渐被高压钠灯所取代。
Based on the illumination and lifetime characteristics of street lights under different supply voltage, the best voltage supply for high-pressure Sodium lamps used in city street lighting is derived.
根据高压钠灯在不同电压下的照度及寿命特性，推导出路灯半夜灯的最佳供电电压。
Based on the illumination and lifetime characteristics of street lights under different supply voltage, the best voltage supply for high-pressure Sodium lamps used in city street lighting is derived.
根据高压钠灯在不同电压下的照度及寿命特性，推导出路灯半夜灯的最佳供电电压。
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