Alara...Here look at mine ( via photobucket) so you can get an idea of a good placement for the MVBs.
http://s451.photobucket.com/albums/qq236/zebraflavencs/Do you see how i have them at one end ? This allows for a cool side, since those MVBs can run HOT !
Also you will want to make certain there is a 4-12 hour burn in period for each bulb, before you use it over a reptile.
And as always, I highly suggest at least a 12" distance from the basking areas, again, to make sure that the dragon isn't getting overheated.
Hope this helps you out ! Can't wait to see the new vivs !
Janie.