For the people asking about light intensity on the canopy... I use the lux light meter app on my android phone to get a pretty good idea of the light intensity distribution on my canopy.
It's def not as good as having a $500 par meter, but it gives me a pretty good idea of whats going on. The numbers it reads out depend on the internal hardware on the phone, so different phones may read out different numbers for the same intensity. I gauge it off of a known good intensity level from a known light.
As measured on my phone, I try to be at 5000lux for clone, 10000lux early veg, 20000-30000lux full veg, and up to 50000lux for full flower intensity.
Anyway, it should reveal the differences in intensities distributed across your canopy.
Measure illumination and light intensity level
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