Quote Originally Posted by lampost
Will this potentially cause any problems?
No.

They were actually clones that were just planted, so they're very young.
Doesn't matter

Can you do this in later stages of veg too?
Yes.

It seems like photoperiod isn't as important during veg, considering some people don't even give any darkness.
Veg is the default growth mode, so long as you don't provide unbroken, long nights the plants will continue to veg.