Ok so my veiled's cage needs full lighting now that his cage doubled in size. His cage is now 4' wide by 2'deep by 4' tall. I plan on getting a T5 fixture that holds eight bulbs. Should I get one 4' fixture or two 2' foot fixtures. I've always heard it's better to get two 2ft ones but I don't have facts to back that. Plant bulbs ain't that expensive so it's really not that much more money to replace an extra 7 plant and 1 uvb bulbs. And whichever way helps ensure the health of Turk sounds better to me. Thanks for the help.