Feminized Seeds - any do any independent study?

I was thinking about getting some feminized seeds.

I would like to hear from someone who knows this; because they did an independent study.

I'm not thinking 100% female - but is the ratio worth the extra cost.

If one were to use an indoor feminised seed out doors - any adverse effect?

There's strains that strive better inside, and some that do better outside, but it'll grow if that's what you're asking Feminized seeds are usually females, not sure on the percentage because some have hermie traits depending on how they're crossed.

I ran a bunch of feminized seeds outdoors this season...No hermies, and I have a porch light about 5 feet away from them that gets turned on time to time...Mostly TH Seeds, a DinaFem, and a Barneys Farms