does anyone have any advice on lights. i have t-5, one white 10K and one actinic. but everyone says HALIDE. what success have each of you had with your lights without going full on 600-1000 dollar lights. like diy, less watts etc. i have a 75 gallon 48"X18"X20", by the way. thanks for the advice. i know the metal halides are beautiful but what's necessary? if i want corals.