First time growing.

Like I said, first timer here. Right now i have 3 plants all in 5 gallon buckets growing very healthy. They are all in the flowering stage, thus they are running a 12/12 light cycle. The problem is I just started another batch and i dont have anywhere to run them on a 20/4 light cycle until they need the 12/12. So i have had no choice but to let these new plants grow on a 12/12 cycle for their entire lives (because of room limitations). What will be the negative outcomes? They are starting to show sex, and the only thing i have noticed so far is that they are a lot smaller. HELP!! :?
 
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