best T5 tube combo for a planted tank?

have found a set up to buy in a few months time that has pre fitted T5 lights, with cheapo tubes coming standard.
im trying to figure out prices at this point and out of interest was wondering what the best t5 tubes would be to use in a 39W for a planted tank?
will eventually fit the hood out with LED, probably aquarays, as have huge success with a groLED tile that is currently over my tank, but will keep the T5s until finances eventually permit :wink:
any advice appreciated :)

just throw a couple of sylvania growlux tubes in you wont regret it