night brightness

例句：

1. 1.The city's night sky is often illuminated by the brightness of the stars.
   城市的夜空经常被星星的明亮所照亮。
2. 2.The new street lamps have significantly improved the night brightness in this area.
   新的街灯已经显著提高了这个地区夜间的亮度。
3. 3. The moonlight cast a soft glow on the lake, adding to the night brightness.
   月光在湖面上投下柔和的光芒，增加了夜间的亮度。