lumeter

例句：

1. 1. The light from the sun is measured in lumen.
   太阳发出的光以勒米特为单位测量。
2. 2.The luminance of the moonlight was almost too bright to see clearly.
   月光的亮度几乎太亮了，看不清楚。
3. 3.The luminescence of the stars is a wonder to behold.
   星星的发光现象是一种令人惊叹的景象。