The Hemp Goddess said:Sorry, but I know that I am correct. I am guessing that you are talking equivalent wattage on the CFLs, which is immaterial for growing. CFLs put out less light (lumens) per watt than a HPS. And 400w (actual watts) of CFL and 400W of HPS will cost the same to run--400 watts is 400 watts, regardless of what is consuming the power. However, the 400W of HPS will put out almost twice as much light as the CFLs and the HPS will run cooler. This is fact and is really not disputable.
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Amen.........lol
No matter if it is a coffee maker or a cd player or a cfl... if it uses 400 watts of power it uses 400 watts of power....the question is how much bang (lumens) you get for your buck. It is consumption period.