luminous flux的用法和樣例：
例句
用作名詞 (n.)
- Device in which the phenomenon of reflection is used to alter the spatial distribution of the luminous flux from a source.
利用反射現象來改變光源光通量的空間分佈的裝置。 - Another attribute is the flux or radiant power that can be delivered in that narrow frequency band.
另一個性質就是在這樣窄的頻帶內可以給出很高的光通量或輻射功率。
