In an electric current there is a constant interchange between anode and cathode or positive and negative poles. A light particle expands as it leaves the anode in an outward radial direction and contracts as it radially approaches the anode. This light particle has been the same light particle at all times in all parts of its journey. Its variation of charge and discharge, its direction of motion and the condition of wave pressure in which it finds itself at any time are the sole reasons for its changing from one condition to another. The light particles are all the same light particles, all being different only in pressure condition.
They all seem to have different qualities and attributes, but those qualities and attributes are likewise given to them purely by the positions they occupy in their waves. [Walter Russell, The Secret of Light, pages 167-168]