Depends on if you mind changing the bulbs yearly once they wear out. T5 you can adjust the bulb combinations to get the colors you want. As others have said just be careful with the height/length of running the fixture as high quality fixtures like
ATI do put out a lot of light.
LEDS you save on electricity, but typically get a more bluer look.
I would recommend depending on the size of tank a nice ATi 6 bulb fixture. Combinations will depend on your preference,but as kingator pointed out typically ati blue+ bulbs are the best.
I would do starting from the front to back
- ATI blue +
- ATI blue +
- ATI purple +
- ATI aqua blue special
- Ati Blue +
- Ati Blue + or GE 6700K