I refer to total cost includding air conditioners, christmass trees, ect. Dzhuo i use on my tank 4 ballast, three 250w mh and one 660w vho, three 4" fans, one iwaki 40rlxt water pump, one 1/4 chiller, another pump for the skimmer. I post this question beacause Im planning to set up again my 55g tank that i shuttdown for my 125g new tank. I have everything for this tank i only have to made a new stand and few misscelaneous and thats it. I need to learn how to calculate my light consumption, let me practice with ChrisIsBored calculator and thanks for the replyes, Ralphyhp.