Peak power last year was 80 Amps (9,000 Watts - About the equivalent of running 6 hair dryers at the same time).  Keep in mind that is the peak amount, most of the time the display is only drawing about 40 - 80 amps.  The display is very safe.  We have 16 dedicated circuits, all GFCI (Ground fault circuit interrupted) protected.  This  will shut off the power immediately if any current passes to ground (ie. the grass, a wet bush, or through someone's body).  It makes the display much more difficult to keep running in the rain, but safety has to come first.  If it's wet out, and part of the display isn't working, that's why.  From the panel, the display is broken down into 128 individual circuits so very little current is actually passing through any cord in the yard.  The chance of anything overheating is pretty well zero.