I was referring to the overall health of the plant and fast growth I've seen quite a few threads full of those who say 6hrs of light is not enough for the plant to have maximum growth potential (and it may just be the strain) but I've grown the clones of the same plant with the normal 24 hr days with exact same lighting, feeding schedule, medium, every detail as close to exact as I could get and using the 18hr days seems to be, so far, absolutely devouring the rest this plant is twice the size in a little over half the time I guess I should have put a little more detail in startin this but forgive me I had indeed indulged myself in some very sweet sticky icky at the time and I'm sure you understand the rest haha
And I'll be doin some research into these extreme numbers uve given may be another experiment down the line always enjoy tryin something new not sayin ur wrong at all but past year or so I've been tryin a lot of different things and to be honest I have no doubts in theory that would work but like u say it has to be specific strains now just have to find which ones