Quote Originally Posted by faithless
.

Just mildly theorizing, but perhaps it could be that they shoot up noticably after resting for some hours, but that their growth halted during their rest?

.
could be, i just seem to notice a bit of growth for the 4 hours the lights are off, but you might be right.. in my mind if the growth halts that give the plants time to really take in the nutrients and water to start fresh when they come back on.. what do you think?