I don't think there is a direct translation from Chinese to English. A "陽光男孩" seems to mean a boy with characteristics that are positive, optimistic, outgoing, and energetic. A similar meaning might be a "cool boy" or a "popular boy"? I found this on the internet from: https://musingsatypical.wordpress.com/category/neologisms/

有點類似這種感覺: 有種陽光般的笑容 給人溫暖 活潑外向 也愛運動

是什么意思？