ive seen those round flros. at the home dpot jus a couple hrs ago that are 18" 32watts soft white,cool white. the only thing is that the socket is on the side you would have to space them about 4 in. away frm each other. IMO i would put jus one at the top of the chamber or two side by side dependin on ur space and add cfls on the sides 6-8 evenly spaced but if ur going with an expriment go for it.or drop it right over a scrog with the cfls at the same level. good luck:thumbsup:

TraY

DREAM BIG!