a 400 watt hps can grow up to one sq meter area. You describe a .33 sq meter area. I would not go with less than 150W HPS. remember when using the florescents that they may not put out the watts per lumen of the HPS. Also, specific HID lamps designed for plants should generally be more efficient.

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Shovelhandle Reviewed by Shovelhandle on . CFL vs 70w HPS vs 150w HPs vs 400w HPs sorry for the confusing title but this is a battle royal of lumens, if you will. i am in the planning stages of a new frank (for those of you not following the grows, frank is the name given to my pet project by my wife, a la frankenstein, a mix-mash pile of parts i put together). the dimensions of the new box are gonna be 45.5" x 21" x 24" (l x w x h). i was thinking about using two 6 bulb (~36", each bulb is ~1600 lumes.) light bars with Y splitters and 26w CFLs of the appropriate Rating: 5