@DansHampf, a little bit of both. I tried to keep it 24" above the canopy for most of the grow. My plants are getting a little too tall for that at the moment. My taller plants are about 12" or so from the light, however, intensity drops towards the outside edges where I keep them.
The Light manufacturer has recommendations for intensity.
30% for Clone/Germination
50-60% for Seedling
70-100% for Veg
100% for Flower
My plants didn't like 100% in veg so backed it off and slowly worked it up over a couple weeks.
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