Why is my plant drooping

Hey everyone im new to this forum its a great place...i have a problem. I have to northernlights/whitewidow i have cloned from a friends mother plants. In the week time i hade them they seemed like they tripled in size. But my problem is that some leaves are drooping and it seems like my plant in not as green as it was....but who knows bc im not that good with color. Also you might see a little burn...it cam from water and a new 400 hps. I have pics can u guys help me.

How much have you watered it in the past 3 days?

I watered them 2 days ago, bc there soil was so dry. But i didnt over do it bc they were still droopy.....i thought i mught had to replant them do i did it 1.5 days ago. They stood up alittle then this moring one is still droopy.

Indoor or outdoor?

needs nitro

They are indoor