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什么是发光效率

贺拉斯-贺

最后更新12 月 26, 2023

什么是发光效率

光效衡量光源将电能转化为可见光的效率。它被定义为光通量(代表光源发出的可见光总量)与光源消耗的电能之比。光效通常用流明/瓦(lm/W)表示。

光效越高,表示光源产生以下光的效率越高 可見光 所消耗的功率。这意味着,光效越高的光源输出越亮,而耗电量越低。

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光效的概念考虑了光源的光谱分布。 光源发出的光.它考虑的是光源在可见光波长范围内产生辐射的能力。如果光源发出更多可见光范围以外的波长,则 光通量 (可见光)与总辐射通量成比例地减少。因此,光源的光效也会降低。

在照明行业,光效是用来评估不同光源效率和效果的重要参数。照明专业人员可以利用它来比较和评估各种照明技术的能效和性能,从而为特定应用选择最合适的光源。

要计算光源的光效,需要用总光通量(流明)除以消耗的电功率(瓦特)。例如,如果一个 90 瓦的灯泡发出 900 流明的可见光,光效的计算方法如下:

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光效 = 光通量(流明)/ 消耗功率(瓦特) 光效 = 900 流明/90 瓦 发光效率 = 10 流明/瓦

在这个例子中,灯泡的发光效率是每瓦 10 流明,即每消耗 1 瓦特电能,就能产生 10 流明的可见光。

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