I have to admit, I was a bit skeptical of this pro Epistar II LED, but it seems to be functioning well so far. The temps are stable, coverage is good... I wish I had a quantum meter so I could give more accurate information! I did notice a slight uptick in growth when I switched from the full spectrum mode to just the veg mode (red to blue). I'll keep on this way for another week and see how she goes. Maybe two more weeks before I start giving nutrients. I fimmed one to see how the strain responds to training.