Can't help you there.
I use high quality seeds that I breed myself during the short season.
I do not use feminized seed, because my Medical recommendation allows 3 mature, and 4 immature plants per patient.
That is enough to keep you supplied through thick and thin.

When I use DWC It's way more than enough!
I actually had to go back to soil because I was yielding more than I'm allowed to posses, (3 ounces per patient.)


LEDs?
Boy did you come to the right place!
Been using them for years.
Built my own in 2008 because the commercial ones were expensive and still not good enough.
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Click on my avatar and browse through my albums.
I think you may find some useful information there.

Shoen danke mein freund!
(Couldn't find a frikken umlaut, so you'll have to do without)

Your English is excellent!
I haven't used my high school german in 50 years, it's a bit "rusty".

So I'll stick to pidgin.

Aloha,
Weeze