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

1.
свет чьей-либо жизни
a person who is extremely important to someone and makes them feel happy and complete
:
•
His granddaughter is the light of his life.
Его внучка — свет его жизни.
•
After they adopted the child, she became the light of their life.
После того как они усыновили ребенка, она стала светом их жизни.