re: GrowLEDHydro 300W LED vs. 400W HID Demonstration
Nine leafer, few slight discrepancies in your math.
Your running a 400w CMH bulb and a suitable ballast. The ballast you chose is a magnetic(of coarse for CMH without a very specific digi) which are generally not very efficient at charging the lamp. The figure to use should be closer to 500 watts to power that 400 bulb.
Edit: perhaps your ballast/line in is better as my ballast draws more than 460, it usually sits just under 500.
Other than that you just get into less universal figures that differ from each setup, primarily cooling. Ss's tent required, I believe, twice the power to cool as his led tent, granted it is not CMH. In my experience, however, I have not found CMH to be all that much cooler.
The reflector you Listed is open, so I imagine the general room ventilation and cooling to be even higher draw. You could of coarse go to a sealed reflector, just a few more bucks in ducting and reflector cost.
The ballast draw of around 500w could be negated by a higher priced digital ballast designed to work a low frequency that the cmh would need, but then higher initial cost.
Nine leafer, few slight discrepancies in your math.
Your running a 400w CMH bulb and a suitable ballast. The ballast you chose is a magnetic(of coarse for CMH without a very specific digi) which are generally not very efficient at charging the lamp. The figure to use should be closer to 500 watts to power that 400 bulb.
Edit: perhaps your ballast/line in is better as my ballast draws more than 460, it usually sits just under 500.
Other than that you just get into less universal figures that differ from each setup, primarily cooling. Ss's tent required, I believe, twice the power to cool as his led tent, granted it is not CMH. In my experience, however, I have not found CMH to be all that much cooler.
The reflector you Listed is open, so I imagine the general room ventilation and cooling to be even higher draw. You could of coarse go to a sealed reflector, just a few more bucks in ducting and reflector cost.
The ballast draw of around 500w could be negated by a higher priced digital ballast designed to work a low frequency that the cmh would need, but then higher initial cost.