the light of somebody’s life
US /ðə laɪt əv ˈsʌmˌbɑdiz laɪf/
UK /ðə laɪt əv ˈsʌmˌbɑdiz laɪf/

1.
das Licht im Leben von jemandem
a person who is extremely important to someone and makes them feel happy and complete
:
•
His granddaughter is the light of his life.
Seine Enkelin ist das Licht seines Lebens.
•
After they adopted the child, she became the light of their life.
Nachdem sie das Kind adoptiert hatten, wurde sie das Licht ihres Lebens.