My place of work did some experimenting on this aspect. Anything up to a meter is okay, and a little after that shows signs of degradation. You could push it to 2 meters, but I wouldn't recommend it. Keep it at 1 meter or below.
My place of work did some experimenting on this aspect. Anything up to a meter is okay, and a little after that shows signs of degradation. You could push it to 2 meters, but I wouldn't recommend it. Keep it at 1 meter or below.