Germanoanswered grow question 5 years ago hey bro , i saw the Brown Spots, it does not look like any deficiency i know or saw , i think it is a sunburn it may be because
1. indoor plants does not have that thick leave Struktur like outdoor ones, so when u put them in sun directly ,it happens that the leaves get sunburns a little
2. i saw in the first week that your leaves were dropping water while under Light , this could be the reason too, u should never spray water on the leaves while under Light
try do fix those both and see if you are gonna get more brown spots or not . i hope i was helpful :D