my cab was actually a double so there were 2 chambers side by side that each measured 2' x 2' 32". 1 had a 150 hps and 4 42watt cfls the other side had a 125 vitelume cfl 4 42watt cfls and a 65watt aquarium strip cfl. here are some old pics of the set up. i've posted them before but i think you will appreciate the set-up anyway!