Imagine you put your frame on a cabinet resting on it's stand
. Instantly the frame is tilted back by 20 or 30 degrees. You now go and sit on your sofa which is a lot lower than the height of your cabinet. You have just put yourself outside the vertical viewing angle and loose any chance of seeing your wonderful photos in glorious technicolor. So you do need to consider where you wish to locate your frame and find one with a suitable viewing angle. That's when you realise the power lead is too short.