I am planning on putting a 175W metal halide 10K w/ 2-55W actinic power compacts. Does anybody have suggestions on fans? I don't really want to put holes in the sides of my canopy but I was thinking because I have a 1"x4" running across the back of my canopy I could mount two fans to it. Here is a pic you can kinda see where I am talking about. Or is this too low?