:: the light from the sun = сонечнае святло (солнечный свет)
in the sunshine — на сонцы (пад сонечнымі праменямі)
Let's sit over there in the sunshine.
The children were out playing in the sunshine.

:: someone or something (such as a person, condition, or influence) that radiates warmth, cheer, or happiness
:: used as a form of address, either in a friendly way, or to express unwillingness to accept another person's delays, bad behaviour, etc. (mainly UK informal)
Hello, sunshine! Вітаю, сонейка!
She was the kind of person who brought sunshine into people's lives.

можа ўжывацца ў негатыўным сэнсе:
Come on, sunshine (даражэнькі), get to work.

солнышко, светик