omg!?! wots ur problem? there is nothing wrong with it! and natural light should do fine for at least another few weeks, stop being paranoid,
haha i was angry when i posted that... lol sorry...

the plant looks all stretched out and untidy, it probably could have done with some LST'ing, but its probably best left alone now, as for the leaves curling downwards it could be root-bound or have nute problems, hope u figure it out, - good luck