Reflowering a plant?

Im running low on room in my box and i was wondering if it was possible to take 1 plant out and stick it back on 24 or 18hrs for the remaining 6 weeks my others finished flowering and then take the single plant out of 18/24hrs and then into 12/12?

I hope that made sense and i apologise for my stupidity

How many weeks have they been flowering? Post pics for any real help. No need for nute info or what soil, just how long in flower with pics.