This is the 4643rd most frequent Chinese word.
点亮
"To light up" or "to illuminate."
In this sentence, '点亮' is used to refer to the literal action of turning on or lighting up a physical light source.
他点亮了房间里的灯。
He lit up the lights in the room.
Here, '点亮' is metaphorically used to express an uplifting or brightening effect caused by someone's smile.
她的微笑点亮了整个大厅。
Her smile lit up the entire hall.
In this sentence, '点亮' conveys an emotional impact of making one's day brighter or more joyful due to receiving good news.