salmonetin
Well-Known Member
Those measurements are pretty much useless. I really don't get the point of these "black wall" PPFD measurements. Who has black walls in their grow room really?
I have grown with Gavita 1000W and it does produce a reasonably uniform 800umol/s/m2 over a 5x5 surface.
Lets stick to actual HPS figures like 1.7umol/s/W to 1.8umol/s/W measured in an Ulbricht sphere or 1.6umol/s/W in a proper grow tent on the canopy.
...its your opinion... mine are totally diferent... those measurementes are really nice... radiometers give us the best measurements for growers...
...black walls are for test only the light of lamp... not the light reflected by walls... cell or other reflect part of tent... other lab testers dont take that in consideration... then her numbers are corrupted by reflected light of walls or ceiling... etc...
Saludos...