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

1.
人生の光
a person who is extremely important to someone and makes them feel happy and complete
:
•
His granddaughter is the light of his life.
彼の孫娘は彼の人生の光です。
•
After they adopted the child, she became the light of their life.
彼らがその子を養子にした後、彼女は彼らの人生の光となった。