I took a quick picture after organizing veg area and noticed a red halo on the ceiling. It has to be the IR or red LED, just found it interesting. Thouht I'd share it and wonder why they flash up on the ceiling like that.
My understanding is blue light lower on the spectrum needs to be less intense vs higher up on the spectrum red light needs to be more intense to achieve to desired effect.
Looking at the QB2000 Spectrum its peak is blue light so I'm using it for veg.
QB2000 Driver
Then flower under the M320...