Quote Originally Posted by mingusdew
I have seen grow 'cylinders' that basically take that idea to the extreme and rotate constantly around 1 light. Im sure those systems cost atleast 5 grand though.
Omega garden, 5g's USED is a good deal on one. I think they run upwards of 8k. They don't give under-leaf lighting though.

Plants are phototropic and want to grow towards a single directional light source. They are designed to photosynthesize on top of the leaf and transpire through the bottom. Under the plant putting that much heat will dry them out VERY fast and be VERY stressful. Put the second HPS OVER the plant and if you want die lighting, go with tube flouros so that the PRIMARY light is above the plant.