If the middle flowered and the outside didn't I would see that as a reasonable explanation but its the middle and one on the end but not the other that is flowering. None of the Jilly Bean under the other light are flowering. They have become to large for the LED at this point but I cant see that it will make a difference by cutting them back. There are branches that are right against the light and they are not flowering. Both lights are on the same timer by the way. I'll be pulling the 2 flowering plants in about 2 weeks so there will only be 4 under the light then. The plan was to be moving all new plants in 2-3 weeks but it may just be maintaining until it cools off and the HPS can come out in September-October.
I'm seriously starting to believe it's one of the panels.
Let me run my scenario by you and see if it's the case or not.
So you have 6 plants lined up under the 2 lights.
Now you said none of the Jillybean's have flowered and that only 2 of the 3 Blue Cheese's under the other panel were flowering.
Let me take a guess and say that the single Blue Cheese that didn't flower was in between the 2 panels (so it was exposed to both lights) and not on one of the far ends, am I right?
If I am, I hate to say it, but it would seem their is something wrong with the panel over the Jillybean's.
At this point, everything else has been ruled out in my mind (based on the presented evidence).
Because if it was stress, the other 2 Blue Cheese's should have taken the hit too, but for some reason didn't and have flowered.
You've got one good panel and one bad panel, but you should still be under warranty though (1 year).
When you get in touch with Gotham Hydro about replacing the panel, make sure you let it be known that you are actively updating other growers about your Blackstar experience via this thread.
It should help keep them from giving you any shit about a replacement (not saying they will, but just in case they do).
Good luck.