What are the tank dimensions? what's your lighting budget?
- note if you go with "high" light you also need to budget "high" CO2 & be consistent with fertilizers/tank maintenance
Is there a local shop where you can go look at various LED vs T5 light options, especially on display tanks? appearance of the tank is very different (point source light vs linear).
Both T5 & LED are suitable, if you like programmable control (over intensity, spectra, light on/off ramps, simulated cloud cover, sunrise/sunset etc) focus on LED, but expect to pay more $$$.
There are some reasonable LED units with on-board controllers (limited compared to what's out there but sufficient for many) with competitive pricing BUT if your tank is 50 - 60cm depth & you want rapid growth, options are more limited (you'd also want to consider HOT5 with decent reflectors for this situation).