Quote:
Originally Posted by parkinsn
You also have to factor in that the ballast also draws watts on both MH and flourescent adding to your total wattage. So trying to compare the two stright across cant be done.
Also you would have to factor in that ballasts are not 100% efficiant.
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That is correct. Only electronic ballasts actually pull what they say they pull. A "250W HQI" ballast (m80) can pull in excess of 350W. You'll get more light, but you'll also being using more juice. There is no free lunch.