this shouldn't be an argument don't trim your fan leaves like others said above me hey need em for photosynthesis, without the proper amount of fan leaves you do more harm then good, like the guy just above me a qp off that plant. dude you shoulda pulled an easy lb with a super cropped monster like that, general rule of thumb if there's less fan leaves then there is height of the plant your doing it wrong.
i'm not gonna say i know the exact science but lets break it down for you guys, you leave your fan leaves on think of it like standing beside the oceans lots of air good breeze mm smells nice. now immagine plucking your fan leaves is like standing ontop of a mountain yea your still able to breath but it's much harder because the MAIN thing required to keep you alive is lacking, if you chop your leaves you will stunt your growth up to 50%, this really shouldn't be something argued about. if you want to waste time and money and effort fighting your self pull your leaves.....