Okey... do u have a actual draw on those 700 mars? And what kind of yield could I aspect from those. I am a Newby with growing, just on my third and forth grow. But let's say I get 600 grams from a 600w bulb every time. What will 2 mars 700 give me? Or is it possible to calculate like that... or calculate with a feeling.. any idea? Thanks for the answer.