1to shine, sparkle, twinkle, or glitter — to emit or reflect light (used for stars, jewels, water surfaces, etc.)
夜空に無数の星が輝いていた。
Countless stars were shining in the night sky.
朝日を受けて湖面がきらきらと輝いた。
The lake surface sparkled in the morning sun.
彼女の指輪が光を受けてきらりと輝いた。
Her ring caught the light and flashed brilliantly.
雪が輝く山頂を見て、思わず息をのんだ。
I gasped at the sight of the mountaintop shining with snow.
2to light up with joy, hope, or excitement — to beam, gleam, or glow figuratively (of a face, eyes, or expression)
合格の知らせを聞いて、彼の顔が輝いた。
His face lit up when he heard the news that he'd passed.
彼女は将来の夢を語るとき、目が輝いていた。
Her eyes lit up when she talked about her future dreams.
彼は今、俳優として最も輝いている時期だ。
He's currently at the peak of his shine as an actor.