What could this be%/

What could this be ina closet waiting for flowering temp 70 to 80 °
Humidity unknown
Water when needed
Lights viparspectra p1000 3 of them
Regular hp mix soil (reused not amended)
Light cycle 18-6
P.h water is 6.5 every time

looks sativa to me

Any chance there’s a fan blowing on it? Looks a little bit like leaf rub to me.