If you are going with 2x2', then 4 bulb 2ft T5HO could be an option.
With a grow tent, you can keep the humidity high, so growing orchids become much easier.
Ya that was another option. Sunleaves makes some nice 4bulb 2ft T5HO set-ups. It would give me a little more room in the tent too! Being that its a little more streamlined then a bulkly reflector and cfl.