Quick Question involving Light Cycle

How soon, after starting the 12/12 cycle is it bad to switch back to vegetative growth if that is even possible to do. what are the effects both good and bad. I heard you should not do it, but I'd like to supercrop, and I heard that doing that in the 12/12 stage is a big NO-NO. Any thoughts?

i hear like 1-2 week in wont hurt it

is that for supercropping or going to veg, cuz my plant now the nodes are getting really small and producing new flower sets pretty fast

ya then dont switch it back to veg. it wouldnt kill it or anything but its growth is already stunted a little bit and later on when u try to re flower it, it wont bloom as well. hope i helped