Got a quick question. I notice on the Woodville VV, that there is a red light that is emitted from the box where the controller resides. This light remains on as long as the unit has the button on the bottom switched to the on position. So here are my questions: 1. Does this light consume significant power to the point that I should be turning the unit off? 2. Should I turn my metal VV grand models off also when not being used?