Super crop the mains to keep it in the tent - no harm from that.
Light leaks are not a major factor to producing "herms".....This is an old "Cervantes" tale. Early day growers had no idea and they blamed that instead of finding out the truth.
Generally it takes several different "stress" points to get herming. Some strains will do it more then others....and KryptoBud ^^ is quite correct....
Wow...someone who knows WTF they are talking about!
Light leaks will only slow bud formation or keep buds from fully forming...they don't cause hermies. CRAP genetics cause hermies.
That's "breeder" speak when they sell you untested, unworked, over-sprayed, purchased clones that they've never grown and have simply rammed through to make seed for sale. It's all your fault. "Grower Error".
Anyone who has been around more than 10-15 years remember that this wasn't an issue in the old days. IF it was...like the "Swerve/Cali-Connection" event that happened about 20 years ago.....he sold tons of packs...then went back and replaced them all. That doesn't seem to be how it works with (most of) the clown base of experts out there now...
JUst don;t overload yer room so you can SEE what is going on...and watch any/all growth next to the stem. Some of this new crap throws balls just after they start to flower...so that's definitely when you should be on your toes the most...
It's never a surity...but buying from folks who have been around years and who have a set line of plants/seeds they sell takes some of the risk away.... moreso than say...buying from the guy who has a few strains HE has crossed and thinks are the grail whose seed descriptions have the word "SHOULD" in it when describing yeilds/terps/etc. "Should" means he doesn't know/didn't take the time to grow em out before he sold em....
Beware.