chasv77answered grow question 5 years ago IMO, you should limit sun exposure to around 4 hrs, for the first couple of days, of being outside.
Whatever light you are providing now, does not nearly have enough UV/IR light to mimic the sun.
I like putting newbie seedlings under trees, for the first couple of days. The indirect light seems to be enough, before sticking them permanently into the sun.
Good growing.