hey.. check out my posts, when i did a few plants- in the basic grow section, they were earlier posts, they have pics..

also check out my setup pictures- i had drawn images, similar to yours.. they may be more effecient or help urs to become more effecient.. but to let you know, 23w CFL wont produce much.. they'll definitely get your kid started tho..

line the top with 2 rows of (6) 25w fullspectrum CFLs... and put 25w between, sticking out on the sides.. may take up space, so u can modify the idea to accomdate your needs..