My guess would be that it would make no noticeable difference or that would be the norm... I have heard this proposed on these boards in the past, yet don't remember anyone shouting out about great results.


You mat be able to add more "days" into your grow, but they would be shorter days...

Flowering for 60 days at 12/12 = 720/720 hrs (60 light/dark cycles)
Flowering for 60 days at 10/10 = 720/720 hrs (72 light/dark cycles)