I'm in the process of gathering up the stuff to upgrade to a predrilled 90 . My 55 has the lights in a canopy and out the back and on the floor snuck out 2 crispy fish chips gets kinda expencive . I was thinking about getting a new light fixture that is suspended above the tank ( but with the open top how many fish take the plunge ? ) . I was just wondering what the pros and cons to these are I know the canopy keeps in more heat ( I have a chiller to keep the tank cool ) I'm concerend about the jumpers .