Is buying a Chiller really all that cheaper in the long run than just lowering the A/C? I'm looking at getting one for my 90 and probably hooking the one up for my 120, I kinda just screwed with amperage and did my best to figure KW rating if the things ran full time and I basically came to like 7.5 a month more just to run the chillers, but then I have to figure that they put out heat into the room which will inevitably make the room hotter causing the AC to run more, I suppose it wouldn't be a big deal if you are only running one chiller or in a remote room or something but I have like 4 tanks in the living room and would be running 3 chillers with well over 2000 watts of combined lighting... jesus I need to stop with all these tanks, and I'm not sure that just dropping the temp in the house 2 degrees wouldn't be a better idea.