Quick Fluorescant Question

I am currently vegging in a large trunk 20" x 20" x 33". With two 300 watt cfls (pics uploaded) I plan on using it just for clones, upgrading my light to a 2ft tube fluorescant. My question being should i go with a two or four tube light?

with fluoros bigger is almost always better. if you can control heat, fit it in without sacrificing needed space, then put it in there.

alright thanks. I have some cfls going now, zero heat problems. Im probably still going to put in some small pc fans.