I liked running halides on my 30" tall tank, but the colors don't pop as much as they do on my led nano.

As far as led fixtures go, I looked for a fixture that had a high output from 400nm to 500nm with a small spike around 650nm and very little presence in the rest of the spectrum. It led me to piece together a custom setup for my current 8 gallon nano, but, after having the wife complain about all the wires, I'm upgrading to a radion pro to put over a 20 gallon long.

I feel that spectrum output is an important consideration with leds as compared to T5s or MHs as leds generally only cover a very specific tight bandwidth. Without the right spectrum, growth and color will suffer. With the wrong spectrum, algae will grow more readily.

Just my 2 cents...