23 watt cfl's from "around the house" put out 1600 lumens
1600*8 = 12800 = where ever you light is needed
1* 11,000= 2x2 foot print
12* 1600= 19200 lumens
With some smarts you can place the smaller bulbs all around your plant or build a light box or in my case buy a plastic tub from walmart...