Curling leaves on lowrider

Hi...one of my lowriders is curling (see pics). Its grown in 2X1.5X4 box, 82-4 degrees w/ about 200 total real watts of half daylight & half cool. Almost 4 weeks old. No indication of sexes yet. In potting soil, I water about every 2 or 3 days. How bad is this curling and will it affect the ability for the plant to yield?
Thanks...I don't want to overreact...trying to keep this simple.
Thanks for your input!

Welcome to RIU

You might be over watering, does your soil have extended release ferts? Have you been nuting them.
Also what do you mean "real lights" exactly what kind of lights are you using and how close are they?

Plants dont look too bad.