became cheerful; brightened up
娘が帰って来たので彼の生活が明るくなった。
His life became brighter when his daughter came home.
彩葉明るくなったね
Iroha, you seem much more cheerful now.
— Cosmic Princess Kaguya! (2026)
彼の顔は喜びで明るくなった。
His face lit up with joy.
彼女の声が明るくなった。
Her voice brightened.
彼の顔はパッと明るくなった。
His face lit up.