it depends on the fixture, lamps, ballasts, and reflectors of both t-5 and metal halide fixtures regarding PAR output, but you can keep anything you want under either type of lighting provided you do your research and purchase the correct setup for your needs.
i was under the impression odyssea products were not UL listed. i also heard of them starting fires on occasion.
the more affordable brands that come to mind are current, sunlight supply, coralife. i have even heard wavepoint, and aquatic life weren't bad.
as you spend a few dollars more you go towards hamilton, aquamedic, giesemann, aquactinics, ATI, and the list goes on.