How much leaf loss under the blackstar?.
My soil went extremely acidic 2 weeks into flower (it's an autoflower, so 2 weeks is more like 3-4 in photosensitive terms?). I'm sure the leaves yellowing and falling was due to lockout. But, this plant looked so stunningly different in late veg. Large, lush, bushy, dense, deep green (like I'm seeing with these XGS grows.). I felt the switch to typical red/blue LED contributed to the stress.
I was thinking out loud about whether remaining under that blue/white light in flower would have been better for the plant (notwithstanding the stress below ground). FWIW, the whole experience taught me a lot about not becoming complacent (I had stopped testing runoff because I thought I was dialed in), raising soil ph through risky measures (hydrated lime), and the benefits of foliar feeding as an alternate route of nutrition. I'll attach a photo of her yesterday, as she entered her 10-14 day water-only cleanse.
BTW: I ordered an inexpensive Cidly Apollo with 3750k warm white to experiment on the cheap ($150, free shipping). I wanted to get started with XGS's spectrum before they're available. And, I'll need two -- which I won't be able to swing at once. So, this is a way to step into it cautiously. If the "prototype" works ok, I can go with one XGS and have this prototype as the 2nd unit until I could swing a second XGS. (I had one done with Grow Northern's Rebel spectrum too. I should receive both at the same time and I can compare. The poor man's way to sort out how different spectum work.).