prater before you order any bulbs you should look into the new performance series that URI is puting out. These are non-reflector bulbs so you will need a reflector but they are a lot cheaper then the normal URI bulbs. And those internal reflectors on the bulbs do not do much anyway and this is why URI is making bulbs without them.
I run a LFS and I am setting up a new 180 in my house and I am running 3 each of the Aqua D-Light blue (actinic) and Aqua D-light white (actinic white).
Good Luck, Jack