If I get the opportunity to, I would definitely try to grow an auto flower! 75 days is a pretty quick turnaround, I'm over that already on my outdoor grow right now, so that would have definitely been nice and something I'll be looking into in the future!
I'm wondering if maybe the lights are throwing out more blues in the spectrum than the reds? I was at Walmart just poking around and I saw they have LED lights specific for growing, but some are used more for veg state than the flower state.
Yours looks like it would be fine for vegetative state tho so hopefully they will start flowering very soon!!
I would like a complete tent setup at some point; unfortunately they are a little out of my price range right now, but something I can definitely start saving for!!
RE: 6 months of grow time and still not in flower phase but it is upcoming.