A google search might give more info. But so far I read, the way we observe this night is more to do with our culture, mainly biased/inspired by Persian thoughts, than by Prophetic Traditions. There are some hadiths referring Shab e Barat, but some muftis claim that their ‘chains of narrations’ are weak. Allah knows best. But in general, the month of Sha’ban has great importance in Islam.
Ahh, halwa and ruti of Shab e Barat. Among the many other things that we are missing here.