:)

you should have moved the light closer as I told you.. so the humidity might have dropped, which is quite normal one solution would be to spray water on the leaves before dark as has already been mentioned, it's not a serious problem but should be kept under control you could eventually add some silicon to the spray, many fertilizer companies do this I use Barrier by Top Crop, great price and it works really well basically, silicon increases the size of the plant cells, strengthening them against heat, cold, and also molds and insects

Although it's not an extreme case I believe that is heat stress. from reading your diary your lights are a bit too close so I believe thats the reason for that. If I were you I would never go lower than 20 inches height from canopy to light. I like to keep it at around 24 and at this stage (week 1/2) i keep it at around 27 inches because thay are too young and you don't want the plant to suffer light burn

Sometimes tacoing can happen because of humidity and temperature but it's not necessarily a bad thing. Just don't let your levels get to high. Hope this helps.