While this is all true, less voltage comes with a price and that is more current. 2 times less voltage === 4 times more heating for the same resistance (heatin

While this is all true, less voltage comes with a price and that is more current. 2 times less voltage === 4 times more heating for the same resistance (heating is calculated from R times I^2). This means that short circuits, wiring problems are potentially much dangerous.