leaves can droop from a couple things. over/under watering is usually the culprit. but, a hour or so before lights off, they droop. they can droop for a bit when the lights come on too, but will perk right up pretty quick when the lights come on.
ok here are some pictures. in the beginning i was not using the right kind of lights so i think it may have stunted the growth but any advice will help thanks.