Im really not sure my friend. Im no expert in this area, but im quite sure someone will have an answer for you. I was actually wondering the same thing myself, as i looked at my plant this morning when i woke up and noticed that the leaves where a bit droopy. They were not burnt or anything, just not as perky as before. When i take the plant out of it's dark cycle tonight i will see if there is any improvement, as i have noticed that when taking them out of it's dark cycle the leaves perked up. This i have noted once before. I hope i see the same results tonight. :thumbsup: