My first grow I used CFLs. Two plants with 4x 42w each. Got 2 oz per plant. But, they were photo strains vegged for 2 weeks in soil. In most cfl grows I see, people usually pull .3 - .5 grams per watt.
I never got as much once i "upgraded" to the 125w cfl's because you only have 1 light doing each plant. I got the best result from cfl's using small wattage bulbs but inventively hung around the plants as close as i could get them without touching the plants. Only got burns on the leaves that grew into the plants while i was out at work.
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