An older unit, the lumen per square foot, or foot-candle, has become obsolete.

一种较老的单位是每平方米英尺的流明数，即英寸烛光，这种单位已经废除。

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Casio believes this has been corrected, and states that each unit produced is tested according to the ISO 21118 protocol for lumen measurements.

并且卡西欧相信这个问题已经在正式机型中得到解决，并声明其所生产的每台机器都通过了ISO 21118流明测试标准。

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