First think about color.. Then growth.. Makes life easier..
Mr. Greystoke's chart is quite handy.. Personally I'd go 1 zoo-med
5000k per fixture, then one other bulb of a shade of color that will either enhance warm i.e yellowish or enhance cool i.e bluish..
Ask 100 people, get 100 answers..btw: I've never tried this bulb...
http://www.bigalspets.com/5-000k-flora-sun-t5-ho-fluorescent-lamp-54-w-48.html