light factor

例句：

1. 1. The new design of the lamp has a much higher light factor than the old one.
   这款新灯的设计光因子远高于旧款。
2. 2. The study found that the light factor of the sun's radiation is crucial for life on Earth.
   研究发现，太阳辐射的光因子对于地球上的生命至关重要。
3. 3. The researchers used a sophisticated model to calculate the light factor of the star.
   研究人员使用了一个复杂的模型来计算这颗星的光因子。