this is what i have on my tank, 72 gallon, i have been told that this is sufficient for most, but not all. i have a bubble, hammer, colt, and shrooms
, all doing very well! the only thing that kind of sucks is that my electric bill went up about $60.00. i don't know if this is better or worse than power compacts or metal halide. one of the advisors posted an article on comparisons between them and i believe it said that vho
was more expensive on a monthly basis. the initial cost however was a little lower i think. i got everything for $250. hope this helps!