Grown around 20 plants outdoors, and a few indoors...never had Hermie issues, not once, and most was grown from bagseed...they say it's environmental, but all my plants have been grown in an average of 80% humidity, 35c temps, with plenty of light inconsistencies due to houses around, floodlights I'm my back yard, the moon....you name it. Terri me environments compared to most here.
It just seems to be pure irony that the people that get herms the most are people that spend way too much time controlling the environment and obsessing with stability...these herms seem to be growing out of spite somehow. I've had a housemate grow for years with no concern for light leaks in any way. Turns lights on whenever he wants, leaves vents opened during lights out in a lit room, never managed temps or humidity. Never a Herm over 30-40 plants.
It's strange that it keeps happening to people that go to lengths like sealing zippers, worrying about pinpricks and standby light and putting foil over their tents, meanwhile I throw mine in and out of sun, change the lighting every day, don't monitor anything and I've never had a single issue.
I swear nanners attack people that put in the most effort to control their environment. It is so not fair on these people.