You do have enough light, but as always, more light would be better. I use 10 cfls, most of them are 26 watt 2700k. I am growing a uk cheese clone, and harvested an oz. plus off of just the top half last week. I am letting the rest fatten up better. this is one problem with cfls, they do not penetrate as deep as hps, or mh. just be aware that you may have airy buds if the light is not kept close enough to the plant
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good growing too you