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I dont know much about K aside that its intensity decreases the farther you light is from your plants . Im ashamed to admit that though my general knowledge about weed and gerdening is respectable, I know little about electricy and lighting. Invariably CFLs have the equivalent light output of a more powerful incandescent. Check out the Kelvins for flower you need 2500K, veg 6500K. I've seen one there that was 4100K plants can't really use that. Check out the Kelvins for flower you need 2700K, veg 6500K.
There is some debate on what the best CFL setup would be, but as far as efficiency, and lumen per watt, I believe the 27 watt bulbs are the most efficient. So i was walking through Home Depot yesterday, when I made my way to the lights sections where the bulbs. To my surprise I saw that they had 300 watt CFL light bulbs for $15 dollars, and they fit into a normal light bulb socket! Considering that im flipping desk lamps upside down to use their sockets and hanging them from the ceiling, thats a big deal for me. I've heard that plants need at least 2000 lumens per foot sq.
watt CFL's from Home Depot
I reckon you have this backwards - they are 100 W CFLs equivalent to a 300W incandescent.
