Any idea how far (feet, inches?) the “5x-10x more powerful” Pure White Light 5-min video broadcasts its energy while playing?

The Pure White Light video produce an energetic field at least 40 feet in diameter, but: a) the energy is always most strongly felt somewhere near the source of the field; and b) the videos included in our newest programs (like Neuro-Energetics, for example) produce an even larger field.