iBas- that edge curling is almost certainly environmental,... heat is the most common cause, combined with low RH too sometimes, but overly close lighting make it too intense, and proximity heat can be too much... meaning, the ambient T may be fine, but if the lights are too close, they get elevated surface temps right at that spot, and can be too much,.. your LED should be about 18+" away from young plants like that, more if it's a fat wattage unit! As for the leaf angling, that's not an uncommon response, not a bad thing either,...